Libre Office Calc, so UBUNTU 2004 is opening just the icon in the lateral bar

[fabrimi]

Just my first time on UBUNTU 2004,
I have launched the LibreOffice Calc from ‘Show Application’, an icon has been added to the side bar but clicking on all windows I can see just to rectangular with a X inside each one. I can not open anything
I have launch from terminal the command:
libreoffice --calc, no error just a flash on the display and the terminal is in hanging, I should close with ctrl C

I have also given the command

dpkg --list | awk '/ii/&&/libreoffice/{printf "%-4s%-40s%-20s\n",$1,$2,$3}'

result:
ii  libreoffice-base-core                   1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-calc                        1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-common                      1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-core                        1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-draw                        1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-gnome                       1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-gtk3                        1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-help-common                 1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-help-en-us                  1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-impress                     1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-math                        1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-ogltrans                    1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-pdfimport                   1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-style-breeze                1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-style-colibre               1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-style-elementary            1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-style-tango                 1:6.4.7-0ubuntu0.20.04.1
ii  libreoffice-writer                      1:6.4.7-0ubuntu0.20.04.1

Please could you help me. Write and Presentation work properly.
Thanks in advance

[Edit - Opaque] Output to preformatted text for readability.

[ml9104]

First, it’s Ubuntu 20.04, not 2004.
Second, this is not a LibreOffice problem, it’s a desktop problem on your Ubuntu.
I run Lubuntu 20.04 (different GUI), but with me the icon has to be made executable to start the program. I expect that Ubuntu is similar.

[fabrimi]

Could be,but I can easily open LibreOffice Write and Presentation just clicking on the icon, the desktop should not work also with these two. How I can check if the the problem is connected with the desktop? Thanks