[HELP] Can't log in.

I made my own server but I can't login. Login always standing in this same place "Logging into the game server". The reason is certainly not firewall and antivirus because I turned it off. Can somebody help me and tell me what could be the reason and how to fix it?

Source? Tried breakpointing? Any exceptions thrown at the server? Database issue?

I could keep the guessing game going, but it will be hard for me to help with this little info.

I did everything on the basis of this film: . Links are in the description. I have the same files.