Report Glitch

I can't log into my account and play because it says "already logged in elsewhere". the last time i played duelingbook is quite a while ago and i don't know which device i used, so how do i get this resolved?

While staying on DB open the console.(by pressing F12 or fn+F12 depending on your settings)
if it's the first time , you'll get it on the right , however , look for the bar in which you can write text inside.

from there , there are 2 Ways to solve it.

1) write and send : gotoMainMenu();
once sent , you'll get displayed the main menu as you know it , but you're not logged in. So click the exit button as usual. then Login as you'd usually do.

2)write and send : endAllSessions();endAllSessionsE();
it'll ask you to perform the logout , so click on yes.

reinsert credential in the login box , and you'll be able to login back without problems.