To provide potential solution to snapshots failing with this error.
Gather the Protection group name as well as the impacted VMs within that protection group.
Snapshots failing for Protection Group with the following error:
Snapshot for protection group <protection group name> failed. Could not snapshot any VM. Task ID:xxx-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
When viewing the VCDR Connector appliance a VM that is included in the Protection Group's vmdk will be mounted as a HDD
Remove the vmdk from the VCDR Connector appliance
After removing the vmdk from the VCDR Connector appliance consolidate existing snapshots on the impacted VM.