# Shopware Error Log **URL:** \ **Category:** Shopware 6 (German)\ **Created:** [21. Februar 2024 um 15:14 UTC](https://forum.shopware.com/t/shopware-error-log/103072 "2024-02-21T15:14:12Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![schroederweb](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@schroederweb](https://forum.shopware.com/u/schroederweb)\ **Post date:** [21. Februar 2024 um 15:14 UTC](https://forum.shopware.com/t/shopware-error-log/103072/1 "2024-02-21T15:14:12Z")
Hallo Zusammen, folgende Errormeldung finde ich alle 10 Minuten in der Log Datei. Hat jemand ggf. eine Idee woran es liegen könnte. PHP Version 8.2 2024-02-21T15:10:40.568995+00:00] php.CRITICAL: Uncaught Exception: Failed to start the session because headers have already been sent by „/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php“ at line 433. {„exception“:„[object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php" at line 433. at /var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:132)\n[previous exception] [object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php" at line 433. at /var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:132)“} [2024-02-21T15:10:40.569142+00:00] request.CRITICAL: Uncaught PHP Exception RuntimeException: „Failed to start the session because headers have already been sent by „/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php“ at line 433.“ at NativeSessionStorage.php line 132 {„exception“:„[object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php" at line 433. at /var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:132)\n[previous exception] [object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php" at line 433. at /var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:132)“} [2024-02-21T15:10:40.569297+00:00] request.CRITICAL: Exception thrown when handling an exception (RuntimeException: Failed to start the session because headers have already been sent by „/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php“ at line 433. at NativeSessionStorage.php line 132) {„exception“:„[object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php" at line 433. at /var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:132)“} [2024-02-21T15:10:40.569346+00:00] php.CRITICAL: Uncaught Exception: Failed to start the session because headers have already been sent by „/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php“ at line 433. {„exception“:„[object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php" at line 433. at /var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:132)\n[previous exception] [object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php" at line 433. at /var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:132)\n[previous exception] [object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Response.php" at line 433. at /var/www/clients/client1/web12/web/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php:132)“} ---
**Author:** ![juergen-sfx](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.shopware.com/juergen-sfx/32/17270_2.png) [@juergen-sfx](https://forum.shopware.com/u/juergen-sfx)\ **Post date:** [6. März 2025 um 11:01 UTC](https://forum.shopware.com/t/shopware-error-log/103072/2 "2025-03-06T11:01:37Z")
Habe dieses Problem auch in einem Shop und habe keine Idee wie ich die Ursache herausfinden soll. ---
**Author:** ![Max\_Shop](https://avatars.discourse-cdn.com/v4/letter/m/58f4c7/32.png) [@Max\_Shop](https://forum.shopware.com/u/Max_Shop)\ **Post date:** [6. März 2025 um 12:33 UTC](https://forum.shopware.com/t/shopware-error-log/103072/3 "2025-03-06T12:33:25Z")
> [@Php - CRITICAL Uncaught Exception: Failed to start the session because headers have already been sent by](https://forum.shopware.com/t/php-critical-uncaught-exception-failed-to-start-the-session-because-headers-have-already-been-sent-by/101244): > > Hallo zusammen, wir nutzen die Shopware Version 6.4.20.1 und haben mehrere folgender Fehlermeldung im Log stehen: Uncaught Exception: Failed to start the session because headers have already been sent by „/home/beuoynmh/www.xxx.com/webshops/xxxSW6/vendor/symfony/http-foundation/Response.php“ at line 1250. {„exception“:„[object] (RuntimeException(code: 0): Failed to start the session because headers have already been sent by "/home/beuoynmh/www.xxxx.com/webshops/xxxSW6/vendor/symfony/http-found…