Feature SSPLP missing; no check made for change of personal calendar

What causes this issue?

When infotype Absences (2001) is updated, the employee#s personal
calendar is also amended accordingly. The feature <ZK>SSP/SMP Infotype
- PIW Linking Decision </>(SSPLP) checks whether any such changes to
the personal calendar are relevant to linked Periods of Incapacity for
Work (PIWs) for calculation of Statutory Sick Pay (SSP).
Feature SSPLP is currently missing and consequently, no check can be
made to determine whether changes to the employee#s personal calendar
involve linked PIWs.

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?

Maintain feature SSPLP to enable correct updating of the employee
personal calendar. This can be performed using transaction PE03 in the
SAP R/3 System.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.