You are not authorized to change the cost object group in CO area &

What causes this issue?

You are not authorized to change cost object groups in controlling area
&V1&.

System Response

You cannot access the requested data.

How to fix this error?

First check that you have specified the correct controlling area.
If you require access to the cost object groups of the specified
controlling area, contact your system administrator and request that
your authorization profile be enhanced appropriately.

Error message extract from SAP system. Copyright SAP SE.