It looks like the URL is redirecting. I’m not sure if that’s intended or not.
I tried the URL for the China server and it redirected to this…
I’m not sure if that’s an official CodeCombat change or if that’s some kind of scam but the top level domain is 163.com and I’ve never heard of that associated with CodeCombat. Someone with the game staff is going to have to look into this (@maka).