The personnel master record & is not active

What causes this issue?

The employee is not in active employment, e.g. due to end of contract
or other reasons.

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?

Please check whether the function assigned to the employee is correct
or whether s/he needs to be created in the HR master record again as an
active employee.

Error message extract from SAP system. Copyright SAP SE.