Error trying to login with username

Good afternoon everyone!

I made my registration in nextcloud, but when I log in through the site I can only connect using my email, if I use my username always returns password error, could someone help me?

Best regards

Do you use external authentication? Normally you can use your username or mail address. Also check your logfile for errors.

I can only authenticate with my email, I am authenticating through the website, I did not download the app to my mobile device or computer.