A few versions back, the Library/Duplicates view was completely broken.
https://forums.plex.tv/t/version-1-19-5-3006-duplicate-filtering-not-working/
https://forums.plex.tv/t/when-trying-to-view-duplicates-there-was-an-unexpected-error-loading-this-library/
That got fixed really quickly. I wonder if they’re related issues?
