Vendor provider deregistration failed.
The administrator has attempted to unregister a storage provider used by the vSAN and the operation has failed.
According to VMware limitations, you cannot unregister a storage provider used by the vSAN manually. To overcome this limitation, you may remove the necessary hosts from the vSAN cluster and then add them to the cluster again.
Refer to VMware Online Documentation for more information about storage providers used by the vSAN.