Hello there,
Have you tried Checking the log files, and status, reason and error codes?
Try the following troubleshooting steps and see if that helps.
-Make sure that the user has read permissions on the C:\Users\Default folder.
-Check that a roaming or Remote Desktop Services profile has not been set for the user.
-Check the FSLogix logs, and see if a local profile already exists for the user.
-Check that the file share is reachable using the FSLogix Profile Status tool.
-Check that the FSLogix Apps Services is not disabled or stopped.
Hope this resolves your Query !!
--If the reply is helpful, please Upvote and Accept it as an answer–