How to fix this bug "Due to an unexpected error, LibreOffice crashed"

Ẁhile tryin to print or to convert to pdf format a spreadsheet document on LibreOffice Calc, it cashes and i get this message "Due to an unexpected error, LibreOffice crashed. All the files you were working on will now be saved.
I tried to resolve that with various methods ; uninstalling, reinstalling, safe mode, renaming user profile folder to “user-old” but in vain.
Can you help me ?

Which version of LibreOffice on which operating system (incl. distribution / desktop manager in case of a GNU/Linux system and the package repository used)?

But:

Ẁhile tryin to print or to convert to pdf format a spreadsheet document on LibreOffice Calc

lets me ask: Are you accidentally using an Ubuntu 20.04 based system and using LibreOffice from its default repository?

I’m using LibreOffice Version: 6.0.7.3 on Linux Mint Mate (mintMenu.py)
Build ID: 1:6.0.7-0ubuntu0.18.04.10