For some reason I was having some problems with LibreOffice calc and decided to reinstall it. So I did a Apt purge of LibreOffice first then reinstalled using the Linux Mint Software manager. Everything was good until I went to use a template and could find any, the list comes up blank. I’m using Linux Mint ver 19.2 and LibreOffice Version: 6.3.1.2. Ive also tried to change things up using styles and that doesn’t work either
Are you talking about templates provided by LibreOffice or templates created by your own? (On Mint 19.2 default templates reside in /usr/lib/libreoffice/share/template and are provided by package libreoffice-common) - Please consider that your problems may be due to a user profile corruption, which could not be corrected by reinstalling the software but resetting your user profile($HOME/.config/libreoffice/4).