[tom32i]

Did you run these 3 commands? - npm install - bower install - gulp

Can you check if the file web/js/dependencies.js exists in the game folder?

[hvm]

OK, there are no errors now but I still get the error. Does it use some other port? Do I need to open one?

OK. I see it opens a websocket which I guess I need to also forward to my server.