BDRSheild backup of one VM failing with error 102021 backup failed BDRShield

BDRSheild backup of one VM failing with error 102021 backup failed BDRShield

Hello 
I had a trial running until Feb 23 and it expired. Backup was running ok until it expired.  On March 27,   I changed it to the free version and tried to run and it is failing with the above error message.
See attached

Thanks!