I recently migrated one of our SQL Server Database Engine and SSRS instances from SQL Server 2008 to SQL Server 2014. Post migration, when I tried to browse the SSRS reports, I get this error:
Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database. This may be due to a connection failure, timeout or low disk condition within the database . ---> System.Data.SqlClient.SqlException: Invalid object name 'ReportServerTempDB.dbo.TempCatalog'.
Could not use view or function 'ExtendedCatalog' because of binding errors.