You have no authorization for posting in business area &

What causes this issue?

You do not have the authorization to edit the above-mentioned object.

System Response

The desired process is not executed.

How to fix this error?

Providing your entries are correct, see to it that you are given the
authorization for the authorization object "F_BKPF_GSB" for the
above-mentioned business area with the activity "01".

Error message extract from SAP system. Copyright SAP SE.