Can't log into Tank Leader

[Maztar]

I can't log in, it says "Max Sessions Authentication Failed"
Anyone knows how to fix that?

 

[Aevitas]

Go to Home Page - Buddy Auth Portal and log in or sign up with the e-mail address you've used to purchase your license. Once you're in, go to the "Sessions" page, and kill any running sessions that you're not currently using. Generally spoken, abandoned sessions are cleared within a couple of minutes, 5 minutes tops automatically though.