We migrated from SharePoint 2010 to SharePoint 2016. We migrated over our SharePoint 2010 workflows - all of them are running fine. However, when we try and open them in SharePoint Designer 2013 it fails. There really isn't any error message. I looked in both the SharePoint log files and the Windows event mgr, but nothing I can see in them points to anything. I thought it might be permissions so I tried to access them as the farm account with the same results.
- Only happens with the migrated workflows
- New workflows that are created are accessible
Thanks for any help on this.