No standard text found

What causes this issue?

No text with the key &V1& has been created in the Customizing system.

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?

Check the key which you entered and make any necessary corrections.
If no key exists for the required text, you have to physically
enter this text.
Your system administrator can also enter the key with the relevant text
in the Customizing system, which will allow you to access it at a later
date.
IF &DEVICE& = 'SCREEN'.
<DS:TRAN.OB56>Proceed</>
ENDIF.

Error message extract from SAP system. Copyright SAP SE.