Settlement date within settlement period &1 no longer possible

What causes this issue?

A settlement date is no longer possible in the settlement period &V1&.

System Response

The system tries to determine a valid <DS:DE.PADAT>settlement date</>.
However, in the <DS:DE.WFCID3>settlement period</> &V1&, there are no
longer any valid settlement dates, that have been entered before &V2&.

How to fix this error?

Check the definition of calendar &V1&. It may be necessary to correct
the calendar definition or create a new calendar.

Error message extract from SAP system. Copyright SAP SE.