External Data Refresh failed - Unable to refresh list data in Excel Web Access WebPart

I have created a PivotChart in Excel workbook that fetches data from a SharePoint list using "OData Data Feed". When refreshing the connection in Excel 2013, the updated data is displayed in PivotChart. But when i upload the same to a SharePoint Library and refresh it through Excel Web Access WebPart, it throws an error.

After configuring PowerPivot for SharePoint, i am getting a "We cannot locate a server to load the Data Model" error.

Stack Exception

SSPM: Initialization failed on server : Microsoft.AnalysisServices.ConnectionException: A connection cannot be made. Ensure that the server is running. ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:2383 at System.Net.Sockets.TcpClient..ctor(String hostname, Int32 port) at Microsoft.AnalysisServices.XmlaClient.GetTcpClient(ConnectionInfo connectionInfo) --- End of inner exception stack trace --- at Microsoft.AnalysisServices.XmlaClient.GetTcpClient(ConnectionInfo connectionInfo) at Microsoft.AnalysisServices.XmlaClient.OpenTcpConnection(ConnectionInfo connectionInfo) at Microsoft.AnalysisServices.XmlaClient.OpenConnection(ConnectionInfo connectionInfo, Boolean& isSessionTokenNeeded) at Microsoft.AnalysisServices.XmlaClient.Connect(ConnectionInfo connectionInfo, Boolean beginSession) at Microsoft.AnalysisServices.Server.Connect(String connectionString, String sessionId, ObjectExpansion expansionType) at Microsoft.AnalysisServices.Streaming.OnPremise.Server.Connect(Nullable`1 ctx, Boolean schedulePingTaskOnFailure) at Microsoft.AnalysisServices.Streaming.OnPremise.Server.Initialize(Guid serviceId, CancellationToken ctx) at Microsoft.AnalysisServices.Streaming.OnPremise.Tasks.InitializationTask.Run(CancellationToken ctx)

Check Server Version (ServerName\POWERPIVOT): Fail (Expected:

=11.0.2800.0, Actual: 11.0.2100.60).

--> Check Deployment Mode (ServerName\POWERPIVOT): Pass.

Monitorable Check Server Configuration (ServerName\POWERPIVOT): Fail (Uninitialized, ConfigurationError, WrongVersion).

SSPM: Initialization failed on server ServerName\POWERPIVOT: Microsoft.AnalysisServices.Streaming.ServerConfigurationException: Server ServerName\POWERPIVOT failed configuration checks (Status = Uninitialized, ConfigurationError, WrongVersion). at Microsoft.AnalysisServices.Streaming.OnPremise.Server.AssertServerConfiguration(Server amoServer, CancellationToken ctx) at Microsoft.AnalysisServices.Streaming.OnPremise.Server.Initialize(Guid serviceId, CancellationToken ctx) at Microsoft.AnalysisServices.Streaming.OnPremise.Tasks.InitializationTask.Run(CancellationToken ctx)

Note -

1. SQL Analysis Service(PowerPivot) is in running state.

2. PowerPivot Server has been under Data Model in Excel Service setting.