Selection is only allowed if enhanced certificate processing is active

What causes this issue?

You have made entries for one or more of the following fields without
having marked the enhanced certificate processing:
- No dialog box GR
- Reminder deadline
- Escalation

System Response

This is not allowed.

How to fix this error?

You can only use the following functions with enhanced certificate
processing:
- No dialog box GR
- Reminder deadline
- Escalation

Error message extract from SAP system. Copyright SAP SE.