I am unable to reproduce this locally, can you give me some more details? Are any of the performers favorited, is this for a scene, gallery or image, which version of the plugin are you running?
And for the empty folder removal, that’s not something that’s easily done through the Stash API right now so Librarian can’t support it. But there’s a PR #7126 that is deprecating the Clean task and introducing new tools for marking files/folders as missing, so I’m keeping an eye on that 