IIRC correctly it was only the Hub that was stuck, not the actual backups themselves... If you have a look at your available backups from the appliance itself (either within Webmin or from the commandline) hopefully the real situation should be apparent...
Also you could inform the devs via the Hub feedback (blue button on the left hand side when logged into the Hub).
Have you tries from within the new appliance?
IIRC correctly it was only the Hub that was stuck, not the actual backups themselves... If you have a look at your available backups from the appliance itself (either within Webmin or from the commandline) hopefully the real situation should be apparent...
Also you could inform the devs via the Hub feedback (blue button on the left hand side when logged into the Hub).