Fixing Power View to SQL Server 2014 SSAS Multidimensional
Scenario: You have Power View integrated with SharePoint. You attempt to create a Power View report that connects to a SQL Server 2014 cube. The connection fails with “Internal Error: An unexpected exception has occurred”. The connection used to work or works with SQL Server 2012 SSAS MD.
Resolution: On the SSAS 2014 server, install Cumulative Update 2 for SQL Server 2014. This article provides more details about the issue.