Fehler nach Upgrade auf 5.3.1

[peter.fl]

Guten Tag

Nach einem Upgrade von 4.13.37 auf 5.3.1 und PHP 8.3.3 erhalte ich im Frondend beim Seitenaufruf die Standard-Fehlermeldung. In /var/logs/ wird mir Folgendes angezeigt:

[2024-03-11T14:23:04.010642+01:00] request.INFO: Matched route "tl_page.3". {"route":"tl_page.3","route_parameters":{"_token_check":true,"_controller":"Contao\\FrontendIndex::renderPage","_scope":"frontend","_locale":"de","_format":"html","_canonical_route":"tl_page.3","parameters":"","pageModel":{"Contao\\PageModel":[]},"_route":"tl_page.3","_route_object":{"Contao\\CoreBundle\\Routing\\Page\\PageRoute":[]}},"request_uri":"https://yyyyyy.xx/los.html","method":"GET"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.374390+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.374557+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.374645+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.460522+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.460658+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.460707+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.475289+01:00] request.CRITICAL: Uncaught PHP Exception Error: "Undefined constant "TL_ASSETS_URL"" at moo_mediabox.html5 line 11 {"exception":"[object] (Error(code: 0): Undefined constant \"TL_ASSETS_URL\" at /home/zzzzzz/www/yyyyyy.xx/templates/moo_mediabox.html5:11)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.529432+01:00] messenger.INFO: Sending message Contao\CoreBundle\Messenger\Message\SearchIndexMessage with contao_prio_low sender using Contao\CoreBundle\Messenger\Transport\AutoFallbackTransport {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage","alias":"contao_prio_low","sender":"Contao\\CoreBundle\\Messenger\\Transport\\AutoFallbackTransport"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.531734+01:00] messenger.INFO: Received message Contao\CoreBundle\Messenger\Message\SearchIndexMessage {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:04.535843+01:00] messenger.INFO: Message Contao\CoreBundle\Messenger\Message\SearchIndexMessage handled by Contao\CoreBundle\Messenger\MessageHandler\SearchIndexMessageHandler::__invoke {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage","handler":"Contao\\CoreBundle\\Messenger\\MessageHandler\\SearchIndexMessageHandler::__invoke"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.368996+01:00] request.INFO: Matched route "tl_page.3". {"route":"tl_page.3","route_parameters":{"_token_check":true,"_controller":"Contao\\FrontendIndex::renderPage","_scope":"frontend","_locale":"de","_format":"html","_canonical_route":"tl_page.3","parameters":"","pageModel":{"Contao\\PageModel":[]},"_route":"tl_page.3","_route_object":{"Contao\\CoreBundle\\Routing\\Page\\PageRoute":[]}},"request_uri":"https://yyyyyy.xx/los.html","method":"GET"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.577310+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.577410+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.577453+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.629675+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.629780+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.629824+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.636220+01:00] request.CRITICAL: Uncaught PHP Exception Error: "Undefined constant "TL_ASSETS_URL"" at moo_mediabox.html5 line 11 {"exception":"[object] (Error(code: 0): Undefined constant \"TL_ASSETS_URL\" at /home/zzzzzz/www/yyyyyy.xx/templates/moo_mediabox.html5:11)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.659087+01:00] messenger.INFO: Sending message Contao\CoreBundle\Messenger\Message\SearchIndexMessage with contao_prio_low sender using Contao\CoreBundle\Messenger\Transport\AutoFallbackTransport {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage","alias":"contao_prio_low","sender":"Contao\\CoreBundle\\Messenger\\Transport\\AutoFallbackTransport"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.660194+01:00] messenger.INFO: Received message Contao\CoreBundle\Messenger\Message\SearchIndexMessage {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.661642+01:00] messenger.INFO: Message Contao\CoreBundle\Messenger\Message\SearchIndexMessage handled by Contao\CoreBundle\Messenger\MessageHandler\SearchIndexMessageHandler::__invoke {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage","handler":"Contao\\CoreBundle\\Messenger\\MessageHandler\\SearchIndexMessageHandler::__invoke"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.641636+01:00] request.INFO: Matched route "tl_page.3". {"route":"tl_page.3","route_parameters":{"_token_check":true,"_controller":"Contao\\FrontendIndex::renderPage","_scope":"frontend","_locale":"de","_format":"html","_canonical_route":"tl_page.3","parameters":"","pageModel":{"Contao\\PageModel":[]},"_route":"tl_page.3","_route_object":{"Contao\\CoreBundle\\Routing\\Page\\PageRoute":[]}},"request_uri":"https://yyyyyy.xx/los.html","method":"GET"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.955224+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.955329+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.955377+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.022286+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.022443+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.022515+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.045792+01:00] request.CRITICAL: Uncaught PHP Exception Error: "Undefined constant "TL_ASSETS_URL"" at moo_mediabox.html5 line 11 {"exception":"[object] (Error(code: 0): Undefined constant \"TL_ASSETS_URL\" at /home/zzzzzz/www/yyyyyy.xx/templates/moo_mediabox.html5:11)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.129645+01:00] messenger.INFO: Sending message Contao\CoreBundle\Messenger\Message\SearchIndexMessage with contao_prio_low sender using Contao\CoreBundle\Messenger\Transport\AutoFallbackTransport {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage","alias":"contao_prio_low","sender":"Contao\\CoreBundle\\Messenger\\Transport\\AutoFallbackTransport"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.131541+01:00] messenger.INFO: Received message Contao\CoreBundle\Messenger\Message\SearchIndexMessage {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.138500+01:00] messenger.INFO: Message Contao\CoreBundle\Messenger\Message\SearchIndexMessage handled by Contao\CoreBundle\Messenger\MessageHandler\SearchIndexMessageHandler::__invoke {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage","handler":"Contao\\CoreBundle\\Messenger\\MessageHandler\\SearchIndexMessageHandler::__invoke"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:05.939458+01:00] request.INFO: Matched route "tl_page.3". {"route":"tl_page.3","route_parameters":{"_token_check":true,"_controller":"Contao\\FrontendIndex::renderPage","_scope":"frontend","_locale":"de","_format":"html","_canonical_route":"tl_page.3","parameters":"","pageModel":{"Contao\\PageModel":[]},"_route":"tl_page.3","_route_object":{"Contao\\CoreBundle\\Routing\\Page\\PageRoute":[]}},"request_uri":"https://yyyyyy.xx/los.html","method":"GET"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.128525+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.128752+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.128895+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.212456+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.212648+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.212740+01:00] php.WARNING: Warning: Undefined array key "class" {"exception":"[object] (ErrorException(code: 0): Warning: Undefined array key \"class\" at /home/zzzzzz/www/yyyyyy.xx/vendor/contao/core-bundle/contao/templates/rss/rss_items_only.html5:6)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.222800+01:00] request.CRITICAL: Uncaught PHP Exception Error: "Undefined constant "TL_ASSETS_URL"" at moo_mediabox.html5 line 11 {"exception":"[object] (Error(code: 0): Undefined constant \"TL_ASSETS_URL\" at /home/zzzzzz/www/yyyyyy.xx/templates/moo_mediabox.html5:11)"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.253027+01:00] messenger.INFO: Sending message Contao\CoreBundle\Messenger\Message\SearchIndexMessage with contao_prio_low sender using Contao\CoreBundle\Messenger\Transport\AutoFallbackTransport {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage","alias":"contao_prio_low","sender":"Contao\\CoreBundle\\Messenger\\Transport\\AutoFallbackTransport"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.254738+01:00] messenger.INFO: Received message Contao\CoreBundle\Messenger\Message\SearchIndexMessage {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}
[2024-03-11T14:23:06.260430+01:00] messenger.INFO: Message Contao\CoreBundle\Messenger\Message\SearchIndexMessage handled by Contao\CoreBundle\Messenger\MessageHandler\SearchIndexMessageHandler::__invoke {"class":"Contao\\CoreBundle\\Messenger\\Message\\SearchIndexMessage","handler":"Contao\\CoreBundle\\Messenger\\MessageHandler\\SearchIndexMessageHandler::__invoke"} {"request_uri":"https://yyyyyy.xx/los.html","request_method":"GET"}

Hierbei fällt mir auf, dass häufig "Warning" vorkommt. Aber mindestens ein Fehler ist sicher irgendwo - für mich versteckt - angezeigt. Im Moment weiss ich nicht mal, was für einen präziseren Thementitel ich hier im Forum setzen soll.

Kann mir jemand sagen, in welche Richtung ich für die Problemlösung gehen soll?

[Spooky]

Du hast ein Template namens "moo_mediabox" in deinem Seitenlayout ausgewählt und in diesem Template befindet sich Code, der nicht mit Contao 5 kompatibel ist.

[peter.fl]

Vielen Dank Spooky, ich bin weitergekommen. Ermutigt durch deinen Tipp habe ich die Meldungen noch genauer durchforstet. Das Meiste sagt mir kaum etwas. Aber ich habe noch 2-3 Begriffe gefunden, die mich an irgendeinen Punkt der Installation erinnert haben. Und als ich dort nachgesehen habe, war tatsächlich etwas nicht so, wie es sein sollte. ZB beim «RSS-Feed»-Modul stand im Layout «veraltet». Nach dem Entfernen des Moduls sah die Seite nochmals besser aus.

Bericht eines Senioren.