Exchange 2013 powershell errors out, and Exchange 2013 ECP doesn’t work correctly

Exchange 2013 powershell errors out, and Exchange 2013 ECP  doesn't work correctly (users get a login screen then a blank page). Moreover there is an EVENT being logged in Administrative Events (Event ID 15021, Source HttpEvent):

An error occurred while using SSL configuration for endpoint 0.0.0.0:444.  The error status code is contained within the returned data.

Error in PowerShell:

VERBOSE: Connecting to MAIL2. New-PSSession : [mail2] Connecting to remote server mail2 failed with the following error messa ge : [ClientAccessServer=MAIL2,BackEndServer=mail2,RequestId=fd9724cd-19fb-4842-b30d-c9c4b976119f,TimeStamp =2015-03-24 18:55:58] [FailureCategory=Cafe-SendFailure] For more information, see the about_Remote_Troubleshooting He lp topic. At line:1 char:1 + New-PSSession -ConnectionURI “$connectionUri” -ConfigurationName Microsoft CategoryInfo : OpenError: (System.Manageme….RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotin gTransportException + FullyQualifiedErrorId : -2144108477,PSSessionOpenFailed

Cause: This event is logged when an error occurred while using SSL configuration for socket address.The error status code is contained within the returned data.