You do not have authorization for &1

What causes this issue?

You want to process an invoicing document using activity &V2&. However,
you do not have authorization (authorization object &V3&) to run this
activity for &V1&.

System Response

Error message

How to fix this error?

You cannot carry out the processing. To have the authorization assigned
to you, contact your system administrator.

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.