can't open or view xlsx files (mac)

Hello lovlies!

First off grateful for Libreoffice!
I have been a user for about a year and a half!
It was working for me super well but then I was having issues opening any file.
I deleted the original download & downloaded the newest version (2020-03-23) … and it was working!

BUT only with MSWord files … all of my xlsx files won’t open & when I try to open them by opening the spreadsheet, it won’t even list the excel files as options to open …

Please help!!! As a Mac user I absolutely HATE numbers/pages/etc. & want my happy awesome Libreoffice back!!!