LibreOffice 6.4 package in LL 5.4 does not work

[Moltke]

Thanks, again. I will try your suggestions ASAP... and for your corrections in posting, too. Much appreciated!

You're welcome. By the way, forgot to mention this, but before installing a new LO version, remember to remove the current one first. Also, one more thing you could try, is renaming the LO folder in your /home/user/.config directory. Just launch thunar,  hit Ctrl + h to show hidden files, click on .config folder, locate the folder libreoffice, select it, hit f2, and rename it to libreoffice.old. Now launch LO, the folder will be recreated, and check if the issue persists. This is just to confirm whether some file might be corrupted in that folder. If the issues doesn't show, you can erase the old folder. If it does, you can delete the new one, and rename back the old folder, just drop the .old.