Servicedesk portal page cannot be opened.
This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. (Exception from HRESULT: 0x8013101B
The functional version of Workflow 7.5.3001.115 was not working. A earlier version of the Workflow installer had been executed to attempt to resolve the issue, generating the above error on execution.
We located and executed the 7.5.3001.115 version of the Workflow installer. This resolved the problem.