Sonarr latest preview version restore backup failed

I have been installing my Sonarr docker images from linuxserver and the version just updated to will run but I am not able to restore from the most recent backup or any backups I have made on previous versions. Something Changed with this version of preview today. I have been updating usually weekly and have not had this problem.
The error I get is: API Error: BadRequest: file must be provided . I have tried on different pcs and same error with any backup.

Thank you for your help,