This error is not about SSF2 Game.
So..., after downloading SSF2, i was wanting to play Mutiplayer Online, so...i need to create a acoount
so.. this appears..
Firefox:

Google Chrome:

so.. what i do, i want to play SSF2 Mutiplayer online
Btw: it gonna be cool, if we don't create a account to play SSF2 Online, so in the Online Option, we have the Log-in Option and the Play online option, in play online option we just put our nickname, and start playing