Nach Update auf 5.3 Backend nicht mehr zu erreichen

[eisenherz]

Hallo!
ich habe mich Schritt für Schritt durch die Anleitung der Contao Academy gehangelt. Zu letzt alle Paket für 5 angepasst und die Aktualisierung auf 5.3 laufen lassen.

Leider kann ich das Backend jetzt nicht mehr erreichen und ich versteh die Fehlerbeschreibung nicht

Update 4-5.3.jpeg

[2026-01-18T20:13:01.511550+01:00] request.INFO: Matched route "contao_backend". {"route":"contao_backend","route_parameters":{"_route":"contao_backend","_scope":"backend","_controller":"Contao\\CoreBundle\\Controller\\BackendController::mainAction"},"request_uri":"https://test26.droplimits.de/contao?do=files&ref=GKAH6f_-&rt=a4084b50.J4fET53suLk00T9xQwxzpChhB9Q0upYQqwG8e-Y4UcY.VPbwBcrZ4tBYu3FHGTw8824jVJlMidh64nbpM5JuBL9R_qkq7YXt_UyUdg","method":"GET"} []
[2026-01-18T20:13:48.781305+01:00] request.CRITICAL: Uncaught PHP Exception Symfony\Component\ErrorHandler\Error\OutOfMemoryError: "Error: Allowed memory size of 402653184 bytes exhausted (tried to allocate 93479888 bytes)" at /usr/www/users/baslerd/Droplimits2026_Test/vendor/contao/core-bundle/src/Resources/contao/drivers/DC_Folder.php line 2798 {"exception":"[object] (Symfony\\Component\\ErrorHandler\\Error\\OutOfMemoryError(code: 0): Error: Allowed memory size of 402653184 bytes exhausted (tried to allocate 93479888 bytes) at /usr/www/users/baslerd/Droplimits2026_Test/vendor/contao/core-bundle/src/Resources/contao/drivers/DC_Folder.php:2798)"} []
[2026-01-18T20:13:55.320845+01:00] request.INFO: Matched route "contao_backend". {"route":"contao_backend","route_parameters":{"_route":"contao_backend","_scope":"backend","_controller":"Contao\\CoreBundle\\Controller\\BackendController::mainAction"},"request_uri":"https://test26.droplimits.de/contao?do=files&ref=yUydjklz","method":"GET"} []
[2026-01-18T20:14:32.093453+01:00] request.CRITICAL: Uncaught PHP Exception Symfony\Component\ErrorHandler\Error\OutOfMemoryError: "Error: Allowed memory size of 402653184 bytes exhausted (tried to allocate 92634824 bytes)" at /usr/www/users/baslerd/Droplimits2026_Test/vendor/contao/core-bundle/src/Resources/contao/drivers/DC_Folder.php line 2798 {"exception":"[object] (Symfony\\Component\\ErrorHandler\\Error\\OutOfMemoryError(code: 0): Error: Allowed memory size of 402653184 bytes exhausted (tried to allocate 92634824 bytes) at /usr/www/users/baslerd/Droplimits2026_Test/vendor/contao/core-bundle/src/Resources/contao/drivers/DC_Folder.php:2798)"} []
[2026-01-18T20:15:35.011154+01:00] request.INFO: Matched route "contao_backend". {"route":"contao_backend","route_parameters":{"_route":"contao_backend","_scope":"backend","_controller":"Contao\\CoreBundle\\Controller\\BackendController::mainAction"},"request_uri":"https://test26.droplimits.de/contao?do=files&ref=EjGx-ZEK","method":"GET"} []
[2026-01-18T20:16:11.907964+01:00] request.CRITICAL: Uncaught PHP Exception Symfony\Component\ErrorHandler\Error\OutOfMemoryError: "Error: Allowed memory size of 402653184 bytes exhausted (tried to allocate 94555424 bytes)" at /usr/www/users/baslerd/Droplimits2026_Test/vendor/contao/core-bundle/src/Resources/contao/drivers/DC_Folder.php line 2798 {"exception":"[object] (Symfony\\Component\\ErrorHandler\\Error\\OutOfMemoryError(code: 0): Error: Allowed memory size of 402653184 bytes exhausted (tried to allocate 94555424 bytes) at /usr/www/users/baslerd/Droplimits2026_Test/vendor/contao/core-bundle/src/Resources/contao/drivers/DC_Folder.php:2798)"} []
[2026-01-18T20:23:25.668487+01:00] request.INFO: Matched route "contao_backend". {"route":"contao_backend","route_parameters":{"_route":"contao_backend","_scope":"backend","_controller":"Contao\\CoreBundle\\Controller\\BackendController::mainAction"},"request_uri":"https://test26.droplimits.de/contao?do=files&ref=sWkdh3mT","method":"GET"} []
[2026-01-18T20:24:17.082017+01:00] request.CRITICAL: Uncaught PHP Exception Symfony\Component\ErrorHandler\Error\OutOfMemoryError: "Error: Allowed memory size of 402653184 bytes exhausted (tried to allocate 93326240 bytes)" at /usr/www/users/baslerd/Droplimits2026_Test/vendor/contao/core-bundle/src/Resources/contao/drivers/DC_Folder.php line 2798 {"exception":"[object] (Symfony\\Component\\ErrorHandler\\Error\\OutOfMemoryError(code: 0): Error: Allowed memory size of 402653184 bytes exhausted (tried to allocate 93326240 bytes) at /usr/www/users/baslerd/Droplimits2026_Test/vendor/contao/core-bundle/src/Resources/contao/drivers/DC_Folder.php:2798)"} []
[2026-01-18T20:43:10.436950+01:00] request.INFO: Matched route "contao_backend". {"route":"contao_backend","route_parameters":{"_route":"contao_backend","_scope":"backend","_controller":"Contao\\CoreBundle\\Controller\\BackendController::mainAction"},"request_uri":"https://test26.droplimits.de/contao","method":"GET"} {"request_uri":"https://test26.droplimits.de/contao","request_method":"GET"}
[2026-01-18T20:43:10.467813+01:00] request.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: "You have requested a non-existent service "contao.image.image_sizes". Did you mean one of these: "contao.image.imagine", "contao.image.imagine_svg", "contao.image.resizer", "contao.image.sizes"?" at Container.php line 263 {"exception":"[object] (Symfony\\Component\\DependencyInjection\\Exception\\ServiceNotFoundException(code: 0): You have requested a non-existent service \"contao.image.image_sizes\". Did you mean one of these: \"contao.image.imagine\", \"contao.image.imagine_svg\", \"contao.image.resizer\", \"contao.image.sizes\"? at /usr/www/users/baslerd/Droplimits2026_Test/vendor/symfony/dependency-injection/Container.php:263)"} {"request_uri":"https://test26.droplimits.de/contao","request_method":"GET"}
[2026-01-18T20:43:10.526024+01:00] contao.cron.INFO: Purged the expired double opt-in tokens [] {"contao":{"Contao\\CoreBundle\\Monolog\\ContaoContext":"{\"func\":\"Contao\\\\CoreBundle\\\\Cron\\\\PurgeOptInTokensCron::__invoke\",\"action\":\"CRON\",\"username\":\"N\\/A\",\"browser\":\"N\\/A\",\"uri\":null,\"pageId\":null}"},"request_uri":"https://test26.droplimits.de/contao","request_method":"GET"}
[2026-01-18T20:43:10.528070+01:00] contao.cron.INFO: Purged the temp folder [] {"contao":{"Contao\\CoreBundle\\Monolog\\ContaoContext":"{\"func\":\"Contao\\\\CoreBundle\\\\Cron\\\\PurgeTempFolderCron::__invoke\",\"action\":\"CRON\",\"username\":\"N\\/A\",\"browser\":\"N\\/A\",\"uri\":null,\"pageId\":null}"},"request_uri":"https://test26.droplimits.de/contao","request_method":"GET"}
[2026-01-18T20:43:10.551461+01:00] messenger.INFO: Stopping worker. {"transport_names":["contao_prio_high"]} {"request_uri":"https://test26.droplimits.de/contao","request_method":"GET"}

[Spooky]

Meinst du wirklich Contao 5.5? Contao 5.5 hat das Lebensende erreicht. Du musst auf die neueste Contao 5.6 Version aktualisieren. Du darfst niemals auf EoL Versionen aktualisieren.

[eisenherz]

Meinst du wirklich Contao 5.5? Contao 5.5 hat das Lebensende erreicht. Du musst auf die neueste Contao 5.6 Version aktualisieren. Du darfst niemals auf EoL Versionen aktualisieren.

Hab ich jetzt wieder alles zerschossen?
Update auf 5.6 brachte keine Verbesserung

5.3-> 5.6.png

[2026-01-18T22:06:08.893663+01:00] request.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: "You have requested a non-existent service "contao.image.image_sizes". Did you mean one of these: "contao.image.imagine", "contao.image.imagine_svg", "contao.image.resizer", "contao.image.sizes"?" at Container.php line 263 {"exception":"[object] (Symfony\\Component\\DependencyInjection\\Exception\\ServiceNotFoundException(code: 0): You have requested a non-existent service \"contao.image.image_sizes\". Did you mean one of these: \"contao.image.imagine\", \"contao.image.imagine_svg\", \"contao.image.resizer\", \"contao.image.sizes\"? at /usr/www/users/baslerd/Droplimits2026_Test/vendor/symfony/dependency-injection/Container.php:263)"} {"request_uri":"https://test26.droplimits.de/","request_method":"GET"}
[2026-01-18T22:06:16.228405+01:00] messenger.INFO: Stopping worker. {"transport_names":["contao_prio_high"]} {"request_uri":"https://test26.droplimits.de/","request_method":"GET"}
[2026-01-18T22:22:22.459343+01:00] request.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: "You have requested a non-existent service "contao.image.image_sizes". Did you mean one of these: "contao.image.imagine", "contao.image.imagine_svg", "contao.image.resizer", "contao.image.sizes"?" at Container.php line 263 {"exception":"[object] (Symfony\\Component\\DependencyInjection\\Exception\\ServiceNotFoundException(code: 0): You have requested a non-existent service \"contao.image.image_sizes\". Did you mean one of these: \"contao.image.imagine\", \"contao.image.imagine_svg\", \"contao.image.resizer\", \"contao.image.sizes\"? at /usr/www/users/baslerd/Droplimits2026_Test/vendor/symfony/dependency-injection/Container.php:263)"} {"request_uri":"https://test26.droplimits.de/contao-manager/users.json","request_method":"GET"}
[2026-01-18T22:22:22.533269+01:00] messenger.INFO: Stopping worker. {"transport_names":["contao_prio_high"]} {"request_uri":"https://test26.droplimits.de/contao-manager/users.json","request_method":"GET"}
[2026-01-18T22:26:40.507378+01:00] request.INFO: Matched route "contao_backend_login". {"route":"contao_backend_login","route_parameters":{"_route":"contao_backend_login","_scope":"backend","_store_referrer":false,"_controller":"Contao\\CoreBundle\\Controller\\BackendController::loginAction"},"request_uri":"https://test26.droplimits.de/contao/login","method":"GET"} {"request_uri":"https://test26.droplimits.de/contao/login","request_method":"GET"}
[2026-01-18T22:26:40.571279+01:00] request.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: "You have requested a non-existent service "contao.image.image_sizes". Did you mean one of these: "contao.image.imagine", "contao.image.imagine_svg", "contao.image.resizer", "contao.image.sizes"?" at Container.php line 255 {"exception":"[object] (Symfony\\Component\\DependencyInjection\\Exception\\ServiceNotFoundException(code: 0): You have requested a non-existent service \"contao.image.image_sizes\". Did you mean one of these: \"contao.image.imagine\", \"contao.image.imagine_svg\", \"contao.image.resizer\", \"contao.image.sizes\"? at /usr/www/users/baslerd/Droplimits2026_Test/vendor/symfony/dependency-injection/Container.php:255)"} {"request_uri":"https://test26.droplimits.de/contao/login","request_method":"GET"}
[2026-01-18T22:26:40.655331+01:00] messenger.INFO: Stopping worker. {"transport_names":["contao_prio_high"]} {"request_uri":"https://test26.droplimits.de/contao/login","request_method":"GET"}

[Spooky]

Hab ich jetzt wieder alles zerschossen?
Update auf 5.6 brachte keine Verbesserung

Poste deine composer.json und die Konsolenausgabe der Update-Operation.