Wage type &1 is not permitted on &3

What causes this issue?

The wage type &V1& of country grouping &V2& is not permitted on date
&V3&.
The check is made by an implementation of the BAdI
<DS:SIMG.HRPAD00_B_WTYP_PERM>HRPAD00_B_WTYP_PERM</>.

System Response

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

How to fix this error?

Check your entries and any system settings (in particular, the checks
made in the implementation of the BAdI
<DS:SIMG.HRPAD00_B_WTYP_PERM>HRPAD00_B_WTYP_PERM</>).

Procedure for System Administrators

If an active implementation of the BAdI exists, the period for which the
wage type being checked is permitted must be specified in the table
ET_WTYP_PERMISSIBILITY. If no entry exists in this table or if the
permissibility period does not cover the entire interval of the check,
the wage type is regarded as not permitted.

Error message extract from SAP system. Copyright SAP SE.