If you are using the Installer or Portable versions of MusicBee downloaded from the MusicBee website, you could apply the latest patch
here. (MusicBee 35 Patched.zip - extract to your MusicBee folder overwriting existing files).
I believe Steven put in some handling to log the problem file in the error log (I've not tested this).
If you are using the MS Store version then you cannot apply this patch. If so, or if the patch does not work, you will have to go the longer way:
In the 'scan folders for new files' window, you have currently selected
iTunes Media\Music folder. What phred is suggesting is to click the 'Choose Folders' button and select a subset of the folders contained in your music folder. Hopefully you can gradually narrow it down to identify the problem file(s).