An unexpected error occurred on redwood job page

Summary:

Getting an error "An unexpected error occurred" when updating/correcting the existing Job in the redwood page. This happens after switched the Job in Redwood page, when creating a new Job works without any error.

The problem is again with custom role, when adding the standard role 'Human Capital Management Integration Specialist' then no error message, so some role is missing. I want to know what role is missing.

There is issue reported before for the same Job, but it is not accessible to me.

Similar one reported to position, tried with adding the rest service as mentioned but didn't solved the problem.