this also fixed my issue as well. using radegast to delete the offending current outfit folders that were created.
From MetaChat Apps Site: https://worldchat2017.wordpress.com/
Sorry for that …
28. November 2020worldchat2017
Look a few sims, no idea which and why, rejected the LLSD login and wanted to use the ancient XML-RPC.
Due to this friends and inventory where not loaded and – really bad – lots of empty current outfit folders created.