I appreciate your wanting to help, but this is getting far too complicated and taking too much time. If I really want a file metadata edited I can just import it to my Windows 11 laptop and edit, then export it back. Thanks again for your time.
Yup, it's frustrating when one problem leads to another. So far, there's nothing serious enough (that was mentioned here) to get worried about, but if you run into further issues with that Windows 10 machine, the Windows in-place repair is always a good non-destructive option to try.