The above error message is displayed in Dynamics 365 and most of the developers\users will look around workflows as the error says “Workflow must be in Published state.”
E.g. Creating a case throws the above error with the following details.
[ebd908b4-2c74-e811-a95d-000d3ae0bc37: ObjectModel Implementation]
The issue is with SLA records associated with Case.
Deactivating SLA records and reactivate them back will resolve the issue.