Plugin changes in hub do not save

This applies to all the sites in the Hub. I am trying to change the backup schedule OR deactivate automatic backups completely. Neither saves. After clicking "update" the wheel spins and then it goes away. Then the setting revert to the original settings. Refreshing the page shows they have not been saved (i.e. backup schedule is the same as it used to be AND/OR backups are still active despite disabling). Changes made from the HUB dashboard do not seem to be consistently saving or being applied.