Hi Ana,
In addition to Priyanka Mathur's suggestion, I would also like to suggest that you check the RFC user within your GRC system.
I believe you may need to check if it has the necessary authorization to update the job. For example, it could be missing the authorization GRFN_USER.
I believe you may be able to check for errors in the job step log. It would say missing authorization. You may also check which rfc user has the missing authorization.