You are not authorized to change users in group &

What causes this issue?

You do not have sufficient authorization for object S_USER_GRP with
ACTVT = 02.

System Response

The operation was interrupted.

How to fix this error?

Get your user administrator to give you the appropriate authorization
for S_USER_GRP, including ACTVT = 02 and CLASS = &V1&.

Error message extract from SAP system. Copyright SAP SE.