Notice: unserialize(): Error at offset 3596 of 4096 bytes in /app/ezplatform/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpCache/Store.php on line 299

Fatal error: Uncaught RuntimeException: Failed to start the session because headers have already been sent by "/app/ezplatform/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpCache/Store.php" at line 299. in /app/ezplatform/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php:141 Stack trace: #0 /app/ezplatform/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php(302): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() #1 /app/ezplatform/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Session.php(249): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->getBag('flashes') #2 /app/ezplatform/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Session.php(259): Symfony\Component\HttpFoundation\Session\Session->getBag('flashes') #3 /app/ezplatform/vendor/symfony/symfony/src/Symfony/Bridge/Twig/AppVariable.php(173): Symfony\Component\HttpF in /app/ezplatform/app/Resources/views/themes/default/pagelayout.html.twig on line 77