"The current value of the 'enum' is invaild

As the following picture shows, I am getting this weird error. I have no idea what is causing it. What is worse, when I click on the error for it to take me to where the problem is, it just returns nothing.
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inside the macro, try clicking on the input node to the macro, and look in its details panel. expand the enum, and it should have a default property text input area. try typing NewEnumerator0 and see if that helps.