Blueprint Network HELP PLEASE!

Ok I’m having trouble understand the networking tutorial video 1 of Networking Basics. It doesn’t work at all for me. I made a Server and Client shortcut and added the text to the target section but nothing works.

My game project folder is located in: C:\Users\Name\Desktop\Duel\BattleArena/BattleArena.uproject

And this is what I’m typing in the TARGET section of the UE4 Editor shortcut:

“C:\Program Files\Unreal Engine\4.5\Engine\Binaries\Win64\UE4Editor.exe” BattleArena.uproject lab?listen -game

In the Client shortcut this is what I’m typing:
“C:\Program Files\Unreal Engine\4.5\Engine\Binaries\Win64\UE4Editor.exe” battlearena.uproject 127.0.0.1 -game

Just like in the video but this is the error I get

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