Tested, because all my character are parent of one character blueprint, I setted up default collision response to pawn for both and deleted my custom “clickable” collision channel to check if custom channels are not causing the problem. Also didin’t worked, simply it does nothing.
I fixed it for now by spawning actor with sphere collision to check overlap and do damage on overlap (works totally normal). But that is not reason why I bought your plugin. So, there is definietly gonna be some problem in code whether it is visualization, translation or other bug.
Also as I mentioned, I downloaded your example shooter project and it doesn’t worked as well on 4.24.3, one possibility is that damage is not firing or collision is not working correctly.