Hello ,
Sorry to hear this did not help you. Please close Twinmotion then delete the entire folder QuixelCloudLibrary and re-open Twinmotion. I believe that should resolve it.
You can check the path in Twinmotion in the preferences to make sure you are deleting the right folder in case you changed it from the default location.
Hope this helps if not you may have to contact us directly so we can better investigate.
Please follow this link to report a bug: https://twinmotionhelp.epicgames.com/s/case-community-page
Kind regards,
Vincent B.