Okay, so it looks like you’re doing it backwards. You need to do a Sphere trace for Objects around the player, then on hit of your chosen actor type, output THAT, that’s your ball. No Interface needed 
But yeah, your interface was backwards, you weren’t calling anything. I think you were trying to use a dispatcher. Here, read this documentation INTENTLY because it CAN be confusing. Seriously confusing but once you get it, you GET it, you know?
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