title: laravel: Password resetter [] is not defined
body: <p>When I go to Laravel's password reset link (example.com/password/reset), write my email and click "Send Password Reset Link" button, it goes to example.com/password/email link and gives an error:</p>
  
  <blockquote>
    <p>[2018-07-21 17:59:35] local.ERROR: Password resetter [] is not
    defined. {"exception":"[object] (InvalidArgumentException(code: 0):
    Password resetter [] is not defined. at
    /var/www/project/vendor/laravel/framework/src/Illuminate/Auth/Passwords/PasswordBrokerManager.php:67)</p>
  </blockquote>
  
  <p>I use Laravel 5.6
  I should note that when I moved my Laravel project to new VPS, this error happened.
  I use laravel on my VPS.
  Whats the problem? </p>