Could not load file or assembly 'RSSharePointSoapProxy' - Solved
The error showed something to do with Reporting services and check that under general settings of CA. The following application setting was missing.
Then found that we need to downloaded and install "Microsoft® SQL Server® 2008 R2 Reporting Services Add-in for Microsoft SharePoint® Technologies 2010" . Did the same and then the problems seems to be fixed. Hope this helps you!!!