laravel login and register are redirecting back to homepage

I have auth forms made with php artisan make:auth, registration form is connected to MySQL database. For the first time registration was successful (at least the data appeared in database), but the user hadn't got authenticated. Then I tried to log in manually and got the message that these data were not found in the database. And now login and register buttons are just not responding, redirecting back to homepage (it's supposed to happen after authentication, but everything shows that the user is not authenticated). What could be the problem?