Parameter disappear

Hi.

I got a strange problem.

So I do an “onactorbeginOverlap” and i want to pass the parameter to a function that will check some condition.
Here is the first part, I got the “object” that triggered the interaction.

Then in my “base_Interactable” Class, I get an event "interaction which need a caller, here, I still got the good parameter. I want to pass it to my function that check some conditions.

But here, my parameters is == to None… And I don’t get why.
All plus link are “Base_Character” class (npc or player basically) and it works perfectly, but when i’m inside the function… nothing, it appears to be none.

75743-screenshot_3.png

I’m seaching why for an hour now but, I don’t think I did something wrong…

Do you have any idea? Q.Q