You have no authorization for extensions (activity &)

What causes this issue?

You have chosen a function for which you do not have the authorization
required.
Test value (extension): &v2&

System Response

The function requested is not executed.

How to fix this error?

You can view the authorization values required:
IF &DEVICE&='SCREEN'
<DS:TRAN.SU53>Execute function</>
ENDIF
To set up the authorization, please contact your system administration.

Error message extract from SAP system. Copyright SAP SE.