Not Enough Arguments, Expected AtlasID:Int

I'm following a tutorial and ran into a problem that isn't being responded to in the comments.
I'm making a list and the error pops up: Not Enough Arguments, Expected AtlasID:Int.
Any advice on how to get this list working?
It uses an extension "External Data Extension" and it's there to bring up sentences that are spoken by NPCs.

Try reinstalling the extensions using repositories. Also, i know code =p