SAP BRIM Provider Order can be submitted but no contract is created (change process ISTD)

Hi Experts,

This question is related to previous entry SAP BRIM Provider Order does not generate a Provider Contract

Currently provider order (Standard Transaction Type PROV) can be submitted but unfortunately it does not create a provider contract when clicking on "Submit".

No error messages are shown on screen. PPF Actions seems to be ok, as status is green (see attached screenshot)

There are no errors in the order and number range is defined.

Can anyone provide a list of requirements für ISTD process to create a provider contract?

Thank you and best regards

Vanessa