Issue logging in to admin

Hello,

I am not able to log into my WP admin https://www.pleazo.com/wp-admin/. When I am in the log in page, I get some text shows up (which is also in my functions.php) and does not log me in or out.

When I try, I get the following: https://snipboard.io/2J9ly0.jpg on https://www.pleazo.com/wp-login.php

The page I need help with: [log in to see the link]