Can't login qBittorrent

I have installed qbittorrent from dietpi-software and used the credentials that are give on

but i get the warning invalid username / password and after to many tries my ip get banned.
I tried this on Chrome, edge, internet explorer and firefox but none of the browser was success.

I also tried different usernames and passwords like admin - adminadmin, and qbittorrent - globalpassword. etc.