Planning object could not be determined

What causes this issue?

The system tried without success to read a planning object with the
following selection:
&V1&
&V2&
&V3&
&V4&

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.