Change binding text in HUD

Hi guys !

I’m doing a game for a school project and I’m in charge of the script.
Currently working on the HUD, I want to have something like a “Current quest” list and want to add or change the content on events (overlapping some box trigger for example).

I have done my HUD, and binded the text of one of the text box, following some tutorials. I can display it but i can’t change the text. I’m sure that’s something totally d*mb but can’t figure out.

In my Level BP, on Begin overlapping a box, I try to Set “Text_Objectif” (Text variable from my FP Character) but I can’t use “Get Player Controller”/“Character”.

My text binding function, where the cast always fail :

I guess I’m misunderstanding with the use of some nodes. Thanks in a advance for any suggestions !