Whoops, looks like something went wrong.

1/1 RuntimeException: Failed to start the session because headers have already been sent.

in /vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php line 142
at NativeSessionStorage->start() in /vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php line 262
at NativeSessionStorage->getBag('attributes') in /vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session/Session.php line 90
at Session->get('_security_admin') in /web/index.php line 111
at {closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in /vendor/silex/silex/src/Silex/Application.php line 282
at Application->Silex\{closure}(object(GetResponseEvent))
at call_user_func(object(Closure), object(GetResponseEvent)) in /vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/EventDispatcher.php line 164
at EventDispatcher->doDispatch(array(array(object(SessionServiceProvider), 'onEarlyKernelRequest'), array(object(RouterListener), 'onKernelRequest'), array(object(LocaleListener), 'onKernelRequest'), array(object(Firewall), 'onKernelRequest'), object(Closure), object(Closure), array(object(MiddlewareListener), 'onKernelRequest')), 'kernel.request', object(GetResponseEvent)) in /vendor/symfony/event-dispatcher/Symfony/Component/EventDispatcher/EventDispatcher.php line 53
at EventDispatcher->dispatch('kernel.request', object(GetResponseEvent)) in /vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpKernel.php line 110
at HttpKernel->handleRaw(object(Request), '1') in /vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpKernel.php line 73
at HttpKernel->handle(object(Request), '1', true) in /vendor/silex/silex/src/Silex/Application.php line 504
at Application->handle(object(Request)) in /vendor/silex/silex/src/Silex/Application.php line 481
at Application->run() in /web/index.php line 135