Failed to load expression host assembly. Details: Could not load file or assembly or one of its dependencies. The system cannot find the file specified. (rsErrorLoadingExprHostAssembly)

Error: Got the following error after upgrading SSRS. Failed to load expression host assembly. Details: Could not load file xxxxxxx or assembly or one of its dependencies. The system cannot find the file specified. (rsErrorLoadingExprHostAssembly) Fix: For SQL Server 2014 to 2016, copy the missing dll to the new folder. From… C:\Program Files\Microsoft SQL Server\MSRS12.MSSQLSERVER\Reporting... » read more