PAY_GROUP_LOOKUP_CODE is invalid. Pay Group is invalid. Invalid Payee context values. Org parameters exist only with party site and supplier site.

As per Oracle Note: 2325864.1

Ensure that a valid pay group has been set up in Payables, by navigating to Setup -> Option -> Payables -> Expense Report Tab.

To verify whether the pay group is valid, please run:

SELECT lookup_code

FROM po_lookup_codes

WHERE lookup_type = 'PAY GROUP'

AND lookup_code = 'Enter Pay Group Name Here'

AND enabled_flag = 'Y'

AND nvl(inactive_date,sysdate+1) > sysdate;