No authorization to change status

What causes this issue?

You do not have authorization to change the status.

System Response

Further processing is not possible.

How to fix this error?

If necessary, contact your system administrator to change your
authorization. For authorization object B_SMAN_WPL, you require the f
ollowing value:
ACTVT (Activity) A3.

Procedure for System Administrators

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.