Shooter Boundary tutorial, wont fire

I worked through shooter tutorials 1-7 (8) no issues

Presently I am on 8 , setting the boundary, right before I apply the boundary settings I test the shooter, and it works…but after I apply the boundary settings and then test the shooter, it doesn’t fire anything!..I attached the playercontroller.cs and the bdestroybyboundary.cs

Thank you! It’s been along time since I have used the forum and forgot to post the all important issue which is the actual error “LOL”
I get this error "“MissingReferenceException: The object of type ‘GameObject’ has been destroyed but you are still trying to access it.” I saw the response below, but already have that , additionally, when I play the game, and the error appears, I can drag and drop the prefab and it works… but when I restart the scene I need to redo the manual fix, it just wont stay on it’s own.

I did double check the boundary and collider and added another attachment of screenshots for reference, along with the added above info of what’s happening. Thanks