You do not have authorization for cash management in company code &

What causes this issue?

You do not have authorization for editing cash management memo records.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If you did not intend to read cash management payment advice notes, the
"Read CM pmnt advice notes" switch must be switched off (see Settings
-> Defaults in the menu).
If your entries are correct, make sure that you are given authorization
for company code &V1& with activity "&V3&" for authorization object
"&V2&".

Error message extract from SAP system. Copyright SAP SE.