Thanks to you, @nobody_special 🤝
But I already guessed where's the problem was be.
https://developer.mozilla.org/en-US/docs/Web/Security/Mixed_content
If it said shortly, I needed to add to the IP address for a connection (for example 192.168.0.150), one of the name of the secure protocols (wss://, https://, etc.) (result: wss://192.168.0.150/)
So, I think that I'm in one step closer to the solution.
Now the developer consoles seems somehow like that:


But the game still doesn't works.
Thanks for your help, again 🤝