LO 6.4.2 upgrade broke LO

I have added LO PPA. I got an update for LO 6.4.2 in update manager but the update wasnt successful

I am not even able to purge it now. Please help.

sudo apt purge libreoffice^C

(base) uma@mint-18-uma ~ $ sudo rm /var/lib/dpkg/lock
(base) uma@mint-18-uma ~ $ sudo rm /var/lib/dpkg/lock-frontend
(base) uma@mint-18-uma ~ $ sudo dpkg --configure -a
dpkg: dependency problems prevent configuration of libreoffice-draw:
libreoffice-draw depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-draw depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-draw depends on libuno-sal3 (>= 5.3.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-draw depends on libuno-salhelpergcc3-3 (>= 3.6.0~beta); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-draw depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-draw (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-writer:
libreoffice-writer depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-writer depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-writer depends on libuno-sal3 (>= 5.3.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-writer depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-writer depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-writer (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-impress:
libreoffice-impress depends on libreoffice-draw (= 1:6.4.2-0ubuntu0.18.04.2); however:
Package libreoffice-draw is not configured yet.
libreoffice-impress depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-impress depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-impress depends on libuno-sal3 (>= 5.3.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-impress depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-impress depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-impress (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-sdbc-firebird:
libreoffice-sdbc-firebird depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-sdbc-firebird depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-sdbc-firebird depends on libuno-sal3 (>= 5.1.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-sdbc-firebird depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-sdbc-firebird depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-sdbc-firebird (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-base:
libreoffice-base depends on libreoffice-common (>= 1:6.4.0~beta1-2~); however:
Version of libreoffice-common on system is 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1.
libreoffice-base depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-base depends on libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-base depends on libuno-sal3 (>= 5.1.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-base depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-base depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-base (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice:
libreoffice depends on libreoffice-base; however:
Package libreoffice-base is not configured yet.
libreoffice depends on libreoffice-draw; however:
Package libreoffice-draw is not configured yet.
libreoffice depends on libreoffice-impress; however:
Package libreoffice-impress is not configured yet.
libreoffice depends on libreoffice-writer; however:
Package libreoffice-writer is not configured yet.

dpkg: error processing package libreoffice (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-sdbc-postgresql:
libreoffice-sdbc-postgresql depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-sdbc-postgresql depends on libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-sdbc-postgresql depends on libuno-sal3 (>= 4.1.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-sdbc-postgresql depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-sdbc-postgresql depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-sdbc-postgresql (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-report-builder-bin:
libreoffice-report-builder-bin depends on libreoffice-base; however:
Package libreoffice-base is not configured yet.
libreoffice-report-builder-bin depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-report-builder-bin depends on libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-report-builder-bin depends on libuno-sal3 (>= 5.1.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-report-builder-bin depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-report-builder-bin depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-report-builder-bin (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-base-core:
libreoffice-base-core depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-base-core depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-base-core depends on libuno-sal3 (>= 5.1.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-base-core depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-base-core depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-base-core (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-core:
libreoffice-core depends on libreoffice-common (>> 1:6.4.2); however:
Version of libreoffice-common on system is 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1.
libreoffice-core depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-core depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-core depends on libuno-sal3 (>= 6.4.0~beta); however:
Package libuno-sal3 is not installed.
libreoffice-core depends on libuno-salhelpergcc3-3 (>= 3.6.0~beta); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-core depends on uno-libs-private; however:
Package uno-libs-private is not installed.
libreoffice-common (1:6.3.5~rc2-0ubuntu0.18.04.1~lo1) breaks libreoffice-core (>= 1:6.4~) and is broken due to postinst failure.
Version of libreoffice-core to be configured is 1:6.4.2-0ubuntu0.18.04.2.

dpkg: error processing package libreoffice-core (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-calc:
libreoffice-calc depends on libreoffice-base-core (= 1:6.4.2-0ubuntu0.18.04.2); however:
Package libreoffice-base-core is not configured yet.
libreoffice-calc depends on libreoffice-core (= 1:6.4.2-0ubuntu0.18.04.2); however:
Package libreoffice-core is not configured yet.
libreoffice-calc depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-calc depends on libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-calc depends on libuno-sal3 (>= 5.3.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-calc depends on libuno-salhelpergcc3-3 (>= 3.6.0~beta); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-calc depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-calc (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-sdbc-mysql:
libreoffice-sdbc-mysql depends on libreoffice-core | libreoffice-core-nogui; however:
Package libreoffice-core is not configured yet.
Package libreoffice-core-nogui is not installed.
libreoffice-sdbc-mysql depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-sdbc-mysql depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-sdbc-mysql depends on libuno-sal3 (>= 4.2.0~rc1); however:
Package libuno-sal3 is not installed.
libreoffice-sdbc-mysql depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-sdbc-mysql depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-sdbc-mysql (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of python3-uno:
python3-uno depends on libreoffice-core (= 1:6.4.2-0ubuntu0.18.04.2) | libreoffice-core-nogui (= 1:6.4.2-0ubuntu0.18.04.2); however:
Package libreoffice-core is not configured yet.
Package libreoffice-core-nogui is not installed.
python3-uno depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
python3-uno depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
python3-uno depends on libuno-sal3 (>= 5.4.0~alpha); however:
Package libuno-sal3 is not installed.
python3-uno depends on libuno-salhelpergcc3-3 (>= 3.6.0~beta); however:
Package libuno-salhelpergcc3-3 is not installed.
python3-uno depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package python3-uno (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-base-drivers:
libreoffice-base-drivers depends on libreoffice-core | libreoffice-core-nogui; however:
Package libreoffice-core is not configured yet.
Package libreoffice-core-nogui is not installed.
libreoffice-base-drivers depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-base-drivers depends on libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-base-drivers depends on libuno-sal3 (>= 5.3.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-base-drivers depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-base-drivers depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-base-drivers (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-style-tango:
libreoffice-common (1:6.3.5~rc2-0ubuntu0.18.04.1~lo1) breaks libreoffice-style-tango (>= 1:6.4~) and is broken due to postinst failure.
Version of libreoffice-style-tango to be configured is 1:6.4.2-0ubuntu0.18.04.2.

dpkg: error processing package libreoffice-style-tango (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-gtk3:
libreoffice-gtk3 depends on libreoffice-core (= 1:6.4.2-0ubuntu0.18.04.2); however:
Package libreoffice-core is not configured yet.
libreoffice-gtk3 depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-gtk3 depends on libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-gtk3 depends on libuno-sal3 (>= 5.1.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-gtk3 depends on uno-libs-private; however:
Package uno-libs-private is not installed.

dpkg: error processing package libreoffice-gtk3 (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of ure:
ure depends on uno-libs-private (= 1:6.4.2-0ubuntu0.18.04.2); however:
Package uno-libs-private is not installed.
ure depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
ure depends on libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
ure depends on libuno-purpenvhelpergcc3-3 (>= 1.4.0); however:
Package libuno-purpenvhelpergcc3-3 is not installed.
ure depends on libuno-sal3 (>= 5.3.0~alpha); however:
Package libuno-sal3 is not installed.
ure depends on libuno-salhelpergcc3-3 (>= 3.6.0~beta); however:
Package libuno-salhelpergcc3-3 is not installed.

dpkg: error processing package ure (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-gnome:
libreoffice-gnome depends on libreoffice-core (= 1:6.4.2-0ubuntu0.18.04.2); however:
Package libreoffice-core is not configured yet.
libreoffice-gnome depends on libuno-cppu3 (>= 4.4.0~alpha); however:
Package libuno-cppu3 is not installed.
libreoffice-gnome depends on libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha); however:
Package libuno-cppuhelpergcc3-3 is not installed.
libreoffice-gnome depends on libuno-sal3 (>= 5.1.0~alpha); however:
Package libuno-sal3 is not installed.
libreoffice-gnome depends on libuno-salhelpergcc3-3 (>= 1.4.0); however:
Package libuno-salhelpergcc3-3 is not installed.
libreoffice-gnome depends on uno-libs-private; however:
Package uno-libs-private is not installed.
libreoffice-gnome depends on ure; however:
Package ure is not configured yet.

dpkg: error processing package libreoffice-gnome (–configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libreoffice-common:
libreoffice-common depends on libreoffice-style-tango; however:
Package libreoffice-style-tango is not configured yet.
libreoffice-common depends on ure; however:
Package ure is not configured yet.
libreoffice-calc (1:6.4.2-0ubuntu0.18.04.2) breaks libreoffice-common (<< 1:6.4.2~rc1~) and is unpacked but not configured.
Version of libreoffice-common to be configured is 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1.
libreoffice-base (1:6.4.2-0ubuntu0.18.04.2) breaks libreoffice-common (<< 1:6.4.2~rc1~) and is unpacked but not configured.
Version of libreoffice-common to be configured is 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1.
libreoffice-impress (1:6.4.2-0ubuntu0.18.04.2) breaks libreoffice-common (<< 1:6.4.2~rc1~) and is unpacked but not configured.
Version of libreoffice-common to be configured is 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1.
libreoffice-writer (1:6.4.2-0ubuntu0.18.04.2) breaks libreoffice-common (<< 1:6.4.2~rc1~) and is unpacked but not configured.
Version of libreoffice-common to be configured is 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1.
libreoffice-draw (1:6.4.2-0ubuntu0.18.04.2) breaks libreoffice-common (<< 1:6.4.2~rc1~) and is unpacked but not configured.
Version of libreoffice-common to be configured is 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1.

dpkg: error processing package libreoffice-common (–configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
libreoffice-draw
libreoffice-writer
libreoffice-impress
libreoffice-sdbc-firebird
libreoffice-base
libreoffice
libreoffice-sdbc-postgresql
libreoffice-report-builder-bin
libreoffice-base-core
libreoffice-core
libreoffice-calc
libreoffice-sdbc-mysql
python3-uno
libreoffice-base-drivers
libreoffice-style-tango
libreoffice-gtk3
ure
libreoffice-gnome
libreoffice-common
(base) uma@mint-18-uma ~ $ sudo apt purge libre
libreadline5 libreoffice-script-provider-bsh
libreadline6 libreoffice-script-provider-js
libreadline6-dev libreoffice-script-provider-python
libreadline7 libreoffice-style-colibre
librecode0 libreoffice-style-elementary
libregexp-assemble-perl libreoffice-wiki-publisher
libreoffice-java-common libresid-builder0c2a
libreoffice-math librest-0.7-0
libreoffice-nlpsolver librevenge-0.0-0
libreoffice-report-builder
(base) uma@mint-18-uma ~ $ sudo apt purge libreoffice
Reading package lists… Done
Building dependency tree
Reading state information… Done
You might want to run ‘apt --fix-broken install’ to correct these.
The following packages have unmet dependencies:
libreoffice-base : Depends: libreoffice-common (>= 1:6.4.0~beta1-2~) but 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1 is to be installed
Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.1.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
Breaks: libreoffice-common (< 1:6.4.2~rc1~) but 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1 is to be installed
Recommends: libreoffice-java-common (>= 1:6.4.2~) but 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1 is to be installed
libreoffice-base-core : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.1.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-base-drivers : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-calc : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 3.6.0~beta) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
Breaks: libreoffice-common (< 1:6.4.2~rc1~) but 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1 is to be installed
libreoffice-common : Breaks: libreoffice-core (>= 1:6.4~) but 1:6.4.2-0ubuntu0.18.04.2 is to be installed
Breaks: libreoffice-style-tango (>= 1:6.4~) but 1:6.4.2-0ubuntu0.18.04.2 is to be installed
libreoffice-core : Depends: libreoffice-common (> 1:6.4.2) but 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1 is to be installed
Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 6.4.0~beta) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 3.6.0~beta) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-draw : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 3.6.0~beta) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
Breaks: libreoffice-common (< 1:6.4.2~rc1~) but 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1 is to be installed
libreoffice-gnome : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.1.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-gtk3 : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.1.0~alpha) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-impress : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
Breaks: libreoffice-common (< 1:6.4.2~rc1~) but 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1 is to be installed
libreoffice-math : Depends: libreoffice-core (= 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1) but 1:6.4.2-0ubuntu0.18.04.2 is to be installed
libreoffice-report-builder-bin : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.1.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-sdbc-firebird : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.1.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-sdbc-mysql : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 4.2.0~rc1) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-sdbc-postgresql : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 4.1.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
libreoffice-writer : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
Breaks: libreoffice-common (< 1:6.4.2~rc1~) but 1:6.3.5~rc2-0ubuntu0.18.04.1~lo1 is to be installed
python3-uno : Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-sal3 (>= 5.4.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 3.6.0~beta) but it is not going to be installed
Depends: uno-libs-private but it is not going to be installed
ure : Depends: uno-libs-private (= 1:6.4.2-0ubuntu0.18.04.2) but it is not going to be installed
Depends: libuno-cppu3 (>= 4.4.0~alpha) but it is not going to be installed
Depends: libuno-cppuhelpergcc3-3 (>= 4.0.0~alpha) but it is not going to be installed
Depends: libuno-purpenvhelpergcc3-3 (>= 1.4.0) but it is not going to be installed
Depends: libuno-sal3 (>= 5.3.0~alpha) but it is not going to be installed
Depends: libuno-salhelpergcc3-3 (>= 3.6.0~beta) but it is not going to be installed
Recommends: libjuh-java but it is not going to be installed
Recommends: libjurt-java but it is not going to be installed
Recommends: libridl-java but it is not going to be installed
Recommends: libunoloader-java but it is not going to be installed
E: Unmet dependencies. Try ‘apt --fix-broken install’ with no packages (or specify a solution).

This is a problem of Launchpad PPA for LibreOffice packages. Please turn to package maintainers.

This problem was dealt on www.linuxmintusers.de (German) in 2 threads. There is no simple answer to your question but it could be solved in many cases. Please send your query to a Ubuntu forum and I am sure you will get satisfying answers for problem solution. - Godspeed

I, also, ran into this same issue.

So I just learned something interesting. I have always used the LibreOffice official repositories so that I have the up-to-date version whenever possible (mostly for testing purposes, and somewhat because the default packages that come on distros tend to be a bit behind)… but this last Mint 18.2 update conflicted with my LibreOffice install. LibreOffice would open, but it looked like some kind of a ‘snap’ package, as it did not pick up on the beautiful Mint theming. Everything SEEMED functional, but it was very hard on the eyes.

At first, I didn’t understand what had happened. I knew there was some kind of ‘warning’ message when I applied the system updates, but it didn’t seem to be anything out of the ordinary.

I tried googling it first, and came up empty as to why LO suddenly looked… awful.

I tried un-installing, purging, re-installing. Same results.
I tried disabling my LO repos and going back to the default Mint repos for LO. LO failed to open at all. It just thought about opening for a few moments, and then nothing. (Turns out it was looking for a package and couldn’t find it, and thus, aborted the opening process. Removing the .config folder for LibreOffice resolved this). LibreOffice had simply lost it’s beautiful Mint flavor.

Purely by messing about and looking at all the available LibreOffice packages, I found the missing key:

I was missing the package: libreoffice-gtk3

Apparently, this package is what allows LibreOffice to pick up on your Distro’s theme.

There is one for GTK, GTK2, and GTK3.

I re-enabled my Official LibreOffice repos, restored my .config LibreOffice folder, and am now back running at full steam where I left off with no issues.