Failed to obtain cluster information. Either the specificed instance of SQL Server is not running on a Windows Server Failover Cluster (WSFC) node, or the user lacks sysadmin permissions on the SQL Server instance to obtain the cluster information.
Make sure you restart SQL Server services after setting the AlwaysOn setting.
SQL SERVER – FIX: Msg 41105: Failed to Create the Windows Server Failover Clustering (WSFC) Resource With Name and Type ‘SQL Server Availability Group’
Disable and Enable the feature using SQL Server Configuration Manager and restart SQL Server service.
Note: Make sure to Disable the feature and hit Apply. Then Re-enable the feature and hit Apply.