Fatal error: Uncaught exception 'RuntimeException' with message 'Failed to start the session because headers have already been sent.' in /home2/cristo/dev/mcx/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php:142 Stack trace: #0 /home2/cristo/dev/mcx/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php(262): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() #1 /home2/cristo/dev/mcx/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Session.php(82): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->getBag('attributes') #2 /home2/cristo/dev/mcx/app/app.php(27): Symfony\Component\HttpFoundation\Session\Session->has('user') #3 /home2/cristo/dev/mcx/app/bootstrap.php(120): require('/home2/cristo/d...') #4 /home2/cristo/dev/mcx/index.php(7): require_once('/home2/cristo/d...') #5 {main} thrown in /home2/cristo/dev/mcx/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php on line 142