The layout was created with the planning tool (see long text)

What causes this issue?

You are attempting to edit a layout that was not created using the
planning tool. The planning tool only uses a limited number of Report
Painter functions. Therefore, you cannot edit layouts using the
planning tool, if they were created using Report Painter.

System Response

The processing is cancelled.

How to fix this error?

Select a layout that was created with the planning tool, or edit the
layout in question using <DS:TRAN.GLPLC>Report Painter</>.

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

Error message extract from SAP system. Copyright SAP SE.