Can'r create login server account

[Mercuman]

I keep getting the the "Missing Variables" error after inputing a username and password. And yes I am using enough characters. Over 5 for the name and over 8 for the password. I was able to create this forum account and attach my phone number to it, but cannot get beyond that. I even launched the game but of course cannot login.

Anyone can help?? Bueller?