Fatal error: Uncaught Symfony\Component\Form\Exception\LogicException: Cannot check if an unsubmitted form is valid. Call Form::isSubmitted() before Form::isValid(). in /var/www/reifenmontage.de/vendor/symfony/form/Form.php:765 Stack trace: #0 /var/www/reifenmontage.de/src/php/Controller/Login.php(44): Symfony\Component\Form\Form->isValid() #1 /var/www/reifenmontage.de/routes.php(55): Controller\Login->run() #2 /var/www/reifenmontage.de/vendor/symfony/http-kernel/HttpKernel.php(152): {closure}() #3 /var/www/reifenmontage.de/vendor/symfony/http-kernel/HttpKernel.php(74): Symfony\Component\HttpKernel\HttpKernel->handleRaw() #4 /var/www/reifenmontage.de/htdocs/index.php(32): Symfony\Component\HttpKernel\HttpKernel->handle() #5 {main} thrown in /var/www/reifenmontage.de/vendor/symfony/form/Form.php on line 765