Hello, from looking at the error: UserId(856135) is not authorized to grant EXECUTE on ObjectId(6,0,oid=150179)
You have to find the owner of Object ID 150179:
select * from objects where object_oid = '<oid>';
The owner of this object needs to grant the EXECUTE privilege to the User 856135 (SYSTEM).
This is explained in the link I provided earlier
BR
Michael