User parameter &1 &2 has not been maintained

What causes this issue?

The system has determined that the user parameter TM_INVOICE_CLERK has
not been maintained.

System Response

In Logistics Invoice Verification you can create and maintain invoice
documents from SAP Transportation Management (SAP TM).
To use the functions, you must first maintain the user parameter
TM_INVOICE_CLERK in your user master record.

How to fix this error?

Choose <LS>System</> -> <LS>User Profile</> -> <LS>Own Data</> or call
transaction <DS:TRAN.SU3>SU3</>.
On the <ZK>Parameters</> tab page, enter the user parameter
TM_INVOICE_CLERK and enter the following values:
<LB>blank</>
When creating invoices in transaction MIRO, the user sees the tab pages
<LS>TM</> and <LS>Purchase Order Reference</> as well as all the tab
pages specified in Customizing (<LS>Material Account</>, <LS>G/L Account
</> and <LS>Contract Reference</>)
<LB>01</>
The user only sees the <LS>TM</> tab page and, depending on Customizing,
the <LS>G/L Account</> tab page. The <LS>Purchase Order Reference</> tab
page is hidden.
<LB>02</>
The user does not see the <LS>TM</> tab page, but sees the <LS>Purchase
Order Reference</> tab page, as well as all tab pages that are visible
according to Customizing (<LS>Material Account</>, <LS>G/L Account</>,
and <LS>Contract Reference</>).

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.