In Workflow Designer, when I try to open a running or recently finished workflow (e.g. by double-clicking a workflow instance listed from the 'last 15 minute' search results), I get the above error message. I can see the info in the other tabs though, Details, Entries, Activities, Messages and conditions. When I try to open a workflow from rule manager ('open workflow'), nothing happens. There is no error message, but nothing opens. The workflows are all working as intended, but I just can't view the design or the workflow tab for the individual instances. The version I'm using is Workflow Designer 10.2.0.216.

When I open Workflow Designer 10.2.0.216 on the server, everything works OK.

Any advice would be appreciated.

Thanks, John