HELP Please!!! Damage, Health issues

Hi All So learning unreal engine and having issues with two things mainly… i cant get the spikes to deal damage to the ball and cant get the health and score to update… help please?? I attached a Bunch of screenshots / combined screenshots. i appreciate help
Im working off the rolling premade with unreal is that helps…

I followed this tutorial … and its not working, it connects with the coin i can tell by the sound, but its not updating the score on the HUD.
Screenshots of the coin and HUD