Cannot hide HUD widget after Level complete

Hello,
I am trying to remove HUD after Level is complete.

I have an event in a widget (Hide Hud), and when triggered, it “remove from parent”
When I bind this to a button, no problem.

But I want to trigger the event when LVL is completed. This, however, does not trigger the event in the HUD. (Even when I try to “remove it from parrent” directly in Blueprint, it does nothing).

(Edit, I see the event being triggered, when I select "No slate… " no idea whats that
no slate

Interestingly, the same method works for me with another widget - after LVL is completed, LVL Complete Widget appears. I use the same referencing to trigger the event, but one works, other does nothing.

Does anybody know, what could be the reason? Or some other method.
Thank you.

I suspect the fact that I bonded text creation to a function (with Bind option next to the Text). I cannot now do anything with the widget unless I use Bind, so I bind the hiding of individual elements to a bool …

Ok, so the thing is I dont know how to refference Widgets, so I created the hud multiple times… which created problem