Like TechSkylander said, that isn't v19.1. You can see right in your screenshot that the move's target is set up as a hexadecimal ("00", in this case), instead of a symbol like "User" or "NearOther". You're getting an error because you aren't using Essentials v19.1Yeah but heres the thing
every move uses the defing method from v19 in my game
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