Posting key missing for debit or credit postings

What causes this issue?

Function module TAX_REP_CREATE_BI_FOR_PAYMENT was called up to carry
out a tax payable posting.
During a tax payable posting, taxes payable are transferred from tax
accounts to a tax payable account. Two posting keys should be
transferred to the function module for debit and credit postings.
However, this has not actually been done.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.