Issue setting instance of blueprint

I’m working on a little basketball VR prototype and I’m having difficulty getting my scoreboard working. I’m fairly new to UE4 so maybe I’m doing something dumb that someone could point out for me.

Anyways, I assign and keep the score in the hoop blueprint, as that checks whether the ball went through the hoop or not. I’m then trying to access that score variable from a scoreboard widget text binding by referencing the hoop blueprint within it and converting the score to a text value. However, I’ve been encountering an accessed none error. I’ve found that this is often the case when the blueprint doesn’t know which instance of the blueprint it should be referencing. So I exposed that variable, but when I go to assign the specific instance, I’m unable to. This can be seen here:

Does anyone have any insight as to what is going on or how to fix this issue?