Error in conditions for node &1: Argument &2 is missing

What causes this issue?

In the conditions for node &V1& the argument &V1& is missing. This
renders the condition incomplete. The condition cannot be interpreted
by the 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?

Add the condition in the argument.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.