an unexpected error occurred while logging in.

I have 2 accounts, i usuallaly play my main account. today i try to log in my main, have a message on top says" an unexpected error occurred while logging in. blablabal", after that i hit log in again then it start rolling the loading authenticating forever. Then i try to log in the game with another account , working just fine and i got logged in instantly.

Is there something wrong with my account?