Issue
After upgrading, the following error might occur when visiting any workflow page:
The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Resolution
To clear this error clear the SharePoint cache and perform an IISReset. For more information, see SharePoint 2010 – Clearing the Configuration Cache.
Additional Information
This error is due to stale information in the SharePoint config cache.
