3642362 - Business Rules Error 'CA-189: Invalid custom rule' when sending the restricted link for checklist instance

• In Production, triggering a business rule that emails a restricted link to a checklist instance fails.
• The same rule works in the Test/Preview environment.
• No email is sent (or the email link is unusable), and system logs show a 400 error from the authentication service.
• Error signature in logs/traces includes:
  • CA-189: Invalid custom rule
  • 400 Bad Request on POST to “http://cloud-authentication-service/api/oauth2/v2/restricted_token”
  • Response body contains “error”:“invalid_request”

SAP Field Service Management

CA-189, CA-329, invalid custom rule, fsm business rules, create permission, checklistinstanceelement, error 400 bad request, missing permission, create restricted link for checklist instance, checklist instance, shareable link , KBA , CEC-SRV-FSM-BR , FSM Business Rules , Problem