cubex-hro/contao-openai-bundle Fehler beim Aufruf der Einstellungen im Backend

Moin,

Folgende Konstellation ist im Einsatz: Contao 5.3.4, PHP 8.3, cubex-hro/contao-openai-bundle v0.1.1

beim testen des moduls cubex-hro/contao-openai-bundle bekomme ich einen Fehler, wenn im Backend die Einstellungen aufgerufen werden:
Internal Server Error
Was ist das Problem?
Class "File" not found

Im Fehler Log habe ich das:

Code:

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[2024-04-24T09:23:44.743901+02:00] request.INFO: Matched route "contao_backend". {"route":"contao_backend","route_parameters":{"_route":"contao_backend","_scope":"backend","_token_check":true,"_controller":"Contao\CoreBundle\Controller\BackendController::mainAction"},"request_uri":"https://<DOMAIN>/contao?do=gpt_config&ref=6F_hqmw4","method":"GET"} {"request_uri":"https://<DOMAIN>/contao?do=gpt_config&ref=6F_hqmw4","request_method":"GET"}
[2024-04-24T09:23:44.777857+02:00] request.CRITICAL: Uncaught PHP Exception Error: "Class "File" not found" at Backend.php line 291 {"exception":"[object] (Error(code: 0): Class "File" not found at /var/www/clients/client13/web206/web/vendor/contao/core-bundle/contao/classes/Backend.php:291)"} {"request_uri":"https://<DOMAIN>/contao?do=gpt_config&ref=6F_hqmw4","request_method":"GET"}
[2024-04-24T09:23:44.811618+02:00] 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://<DOMAIN>/contao?do=gpt_config&ref=6F_hqmw4","request_method":"GET"}
[2024-04-24T09:23:44.811771+02:00] messenger.INFO: Received message Contao\CoreBundle\Messenger\Message\SearchIndexMessage {"class":"Contao\CoreBundle\Messenger\Message\SearchIndexMessage"} {"request_uri":"https://<DOMAIN>/contao?do=gpt_config&ref=6F_hqmw4","request_method":"GET"}
[2024-04-24T09:23:44.813379+02:00] 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://<DOMAIN>/contao?do=gpt_config&ref=6F_hqmw4","request_method":"GET"}

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Hat jemand eine Idee was da los ist?