I am confuse on what problem you are encountering with this game... I tried the game just now and it loaded without a problem. =/
You did make sure you are logged into ArmorGames before attempting to play it, right? Do you have a screenshot of the event perhaps? Warning!!! Black out your email address please before posting it here! =)
I've tested this issue, and it is indeed occurring for me as well. I believe that the e-mail associated to your Armor Games account has already been used to create another Tales of Solaris account.
Since that e-mail can only be used once, it throws an error. My suggestion would be to change your e-mail on your Armor Games account to another e-mail, and then it should work fine. Be aware though, if you play other MMO games it may cause troubles there.