Error when trying to view reports or manually processing the TFS data warehouse and analysis services cube

Hello Guys,

I am trying to configure the reporting for TFS using SQL Server. But I get following error when viewing any report:

So I try to manually process the cube to check if it works. I am following this article: https://msdn.microsoft.com/en-us/library/ff400237.aspx

When I click on GetProcessingStatus and invoke it (with last field set as TRUE) I get following error:

Please advice as to how to resolve this issue and be able to see the reports.