How to properly comunicate from UMG to PlayerCharacter?

Well maybe thats the problem… i dont know how.
from my widget im not referencing my character but the way it works event dispatchers i dont needed (well thats what i think) i just make a call from my widget button and its suposed that i bind that event in my character and reference the widget, well thats the way i was working with other BPs, but with my character it doesnt take the call…

Im receiving this error
Error Blueprint Runtime Error: Accessed None trying to read property MyWidget from function: ‘ExecuteUbergraph_MyCharacter’ from node: Assign My Event Dispatcher in graph: EventGraph in object: MyCharacter with description: Accessed None trying to read property MyWidget