Waindows server 2012 r2 failover cluster access denied

Dear Experts,

I cant access windows failover cluster 2012 r2. the error shows below

"You do not have administrative privilages on the cluster. contact your network administrator to request access."

Error code: 0x80070005

Access denied.

PS C:\> Get-ClusterAccess
Get-ClusterAccess : You do not have administrative privileges on the cluster. Contact your network administrator to
request access.
    Access is denied
At line:1 char:1
+ Get-ClusterAccess
+ ~~~~~~~~~~~~~~~~~
    + CategoryInfo          : AuthenticationError: (:) [Get-ClusterAccess], ClusterCmdletException
    + FullyQualifiedErrorId : ClusterAccessDenied,Microsoft.FailoverClusters.PowerShell.GetClusterAccessCommand

The current user is enterprise administrator,