Can't access to Player UI property

Hi! I need help from someone more experienced in Unreal

I’m following this tutorial Implementing UI for level design

And I’m stucked in this step

After a few seconds of begin play I’ve got this message

LogScript: Warning: Accessed None trying to read property Player UI
SwampLife_C /Game/Swamp/levels/UEDPIE_0_SwampLife.SwampLife:PersistentLevel.SwampLife_C_10
Function /Game/Swamp/levels/SwampLife.SwampLife_C:ExecuteUbergraph_SwampLife:002D
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property Player UI”. Node: Display Narrative Graph: EventGraph Function: Execute Ubergraph Swamp Life Blueprint: SwampLife
LogScript: Warning: Accessed None trying to read property Player UI
SwampLife_C /Game/Swamp/levels/UEDPIE_0_SwampLife.SwampLife:PersistentLevel.SwampLife_C_10
Function /Game/Swamp/levels/SwampLife.SwampLife_C:ExecuteUbergraph_SwampLife:00F8
PIE: Error: Blueprint Runtime Error: “Accessed None trying to read property Player UI”. Node: Set New Objective Graph: EventGraph Function: Execute Ubergraph Swamp Life Blueprint: SwampLife

The variable is like this now

And this is my character Blueprint

I hope this is enough to ask for help, thanks you so much community

The same happens to me.
The Player UIWidget variable its value is none, and it shows me this error

I have created the widget again, now it works.

*. In Ue4ASP_Character I continue creating the Widget in the Begin Play, if I disconnect it it continues to work