Hi,

do you try any authentication process before?
i.e. captcha used by any torrent website

this is a security measure to prove your possession for account

so torrent website put you (x) number of attempts to login, if you fail in this number you won`t be able to access it

you can check my example for this tracker, https://imgur.com/0MWeQe0

so for complete safety look at your number of attempts before you press LOGIN

and tracker sends you emails with that, you may check at your email