You not authorized to perform this action - see long text

What causes this issue?

You are not authorized to carry out the selected action (transaction).

System Response

The transaction is protected by object <DS:UO.FB_SRV_TR>Financial Basis:
Transport</>.

How to fix this error?

See the checked <DS:TRAN.SU53>authorization values</>.

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.