Service not found: even though it exists in the app's container, the container inside

Guten Morgen!
Ich habe ein neues problem mit der Erweiterung "heimrichhannot/contao-api-bundle"
Ich rufe die vorhandene Ressource "ttps://dev.Seite.de/api/resource/member?key=XXX" auf und erhalte im Log folgende Fehlermeldung:

Code:

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request.CRITICAL: Uncaught PHP Exception Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: "Service "huh.api.manager.resource" not found: even though it exists in the app's container, the container inside "HeimrichHannot\ApiBundle\Controller\ResourceController" is a smaller service locator that only knows about the "doctrine", "http_kernel", "parameter_bag", "request_stack", "router", "security.authorization_checker", "security.csrf.token_manager", "security.token_storage", "serializer", "session" and "twig" services. Try using dependency injection instead." at /XXXX/vendor/symfony/dependency-injection/ServiceLocator.php line 129 {"exception":"[object] (Symfony\\Component\\DependencyInjection\\Exception\\ServiceNotFoundException(code: 0): Service \"huh.api.manager.resource\" not found: even though it exists in the app's container, the container inside \"HeimrichHannot\\ApiBundle\\Controller\\ResourceController\" is a smaller service locator that only knows about the \"doctrine\", \"http_kernel\", \"parameter_bag\", \"request_stack\", \"router\", \"security.authorization_checker\", \"security.csrf.token_manager\", \"security.token_storage\", \"serializer\", \"session\" and \"twig\" services. Try using dependency injection instead. at /XXXX/vendor/symfony/dependency-injection/ServiceLocator.php:129)"} []

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Ich bin für jede Hilfe dankbar!!!