An error message has popped when I went to open Libre Office. I have a screenshot which I can forward if that helps?
Edit your post and use the upload icon to add the screenshot here.
See This is the guide - How to use the Ask site?
OP seems to have found a solution in At macOS - How do I fix the "Personal Settings Locked" message - #8 by Rachops
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I replied in the old link provided, pointing out the hidden file issue.
Maybe helpful before taking the radical step of reinstalling LibreOffice!