[UnauthorizedAccessException: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))] [FileLoadException: Could not load file or assembly 'System.Web.RegularExpressions, Version=2.0.0.0, Culture=neutral, PublicKeyToken°3f5f7f11d50a3a' or one of its dependencies. Access is denied.] System.Web.Configuration.RegexWorker..cctor() +0
Go to the Reporting Services Configuration Manager and …