Steps To Reproduce:
1. Start the attached workflow with a single external task.
2. Run the external task client code attached.
3. Go to the definition view, tab incidents
The error message shown isn't the expected "some failure message" but 'Message is null.'
- The problem exists for camunda bpm 7.9. and earlier versions (checked 7.8. already)
- The payload provided by the client looks like this: