Error Could not load file or assembly 'Microsoft.ReportViewer.WebForms' message in Content Author

Product Feature: Upgrade

Operating System: Windows

Database: Microsoft SQL 2014



After performing an upgrade of Content Author from version 6.6.5 to version 6.6.6 the following error message is shown:

Server Error in '/CCMContentAuthor' Application. 

Configuration Error 
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. 

Parser Error Message: Could not load file or assembly 'Microsoft.ReportViewer.WebForms, Version=, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified. 


Microsoft ReportViewer runtime and SQL CLR Types for SQL Server 2014 is required to run Content Author 6.6.6 and is missing from the server hosting Internet Information Services (IIS).


UPDATED: June 26, 2018
Install the following packages on the IIS server and then restart the system:

Download Microsoft ReportViewer runtime
Download Microsoft SQL CLR types for SQL Server 2014

Once restarted connect to Content Author again and verify that the error has been resolved.