Steam Connection Error

Actually, I just installed sostronk, and the last option I need to this is to connect my steam ID. When I tried to connect it, it says Error 404, and then when I checked my profile it has my Steam ID already. After that, my friend tried to invite me to the 10 man lobby and it says my steam ID was not connected. So I tried to make an another account, and I removed the link of my main account’s steam id and switch to the new one. But then, it says steam id not linked again. I don’t know what to do now I think my steam id for sostronk is broken.