Could not load file or assembly ‘Microsoft.ReportingServices.UpgradeScripts, Version=, Culture=neutral, PublicKeyToken=89845dcd8080cc91’ or one of its dependencies. Access is denied.

Posted: 20th July 2011 in Configuration, Sharepoint 2010, SSRS

Came across the above error on all the reports served through SharePoint in integrated mode. Not sure why this happen, but you seem to be able to resolve it by restarting the reports service.

Go to the Reporting Services Configuration Manager ( seen in figure below), connect to the server, then stop and start the service



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