The local node is not part of quorum and is therefore unable to process this operation. This may be due to one of the following ...

The local node is not part of quorum and is therefore unable to process this operation. This may be due to one of the following reasons:

•   The local node is not able to communicate with the WSFC cluster.

•   No quorum set across the WSFC cluster.

 For more information on recovering from quorum loss, refer to SQL Server Books Online.