Hi Team,
These are the error we can frequently getting from Cluster log.
Environment: SQL Server 2016 with AG configured (1 Primary+2Secondaries)
Cluster resource 'File Share Witness' of type 'File Share Witness' in clustered role 'Cluster Group' failed.
File share witness resource 'File Share Witness' failed to arbitrate for the file share '\\share01\QuorumFileShareWitness'. Please ensure that file share '\\share01\QuorumFileShareWitness' exists and is accessible by the cluster.