Open level blueprint doesn't work

Hello, when I press play everything works perfectly but when I launch the game the open level blueprint doesn’t work. I think the problem is that the blueprint can’t find the map for some reason but I don’t know how to fix this.

Bottom of the output log

Fyi: I’ve verified my game so that shouldn’t be the problem. I don’t know a lot about UE4 so I may have done basic mistakes. My UE is updated to 4.8.1