What in the world is this error code?

weird error ue4.png

I just recently started importing audio files for sound effects and this pops up every time I exit the play in editor option to test out what I did. The arrow merged is actually a class blueprint I set up for a projectile arrow that launches out of the wall. Is there an issue where I overlapped the sound wave with the arrow trajectory or something? I’m lost

Could be that you are missing an expected input, one of your nodes should have an ERROR! message on it in red. Hovering over that might explain it.

I figured it out last night after I read this, thanks spaceman. for some reason the the Cast to game mode node went bad or something. When I deleted it and then replaced it with the same exact node, it was fixed.