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[phpBB Debug] PHP Warning: in file [ROOT]/vendor/symfony/dependency-injection/ContainerBuilder.php on line 453: strtolower() expects parameter 1 to be string, array given

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    /**
     * Gets a service.
     *
     * @param string $id              The service identifier
     * @param int    $invalidBehavior The behavior when the service does not exist
     *
     * @return object The associated service
     *
     * @throws InvalidArgumentException          when no definitions are available
     * @throws ServiceCircularReferenceException When a circular reference is detected
     * @throws ServiceNotFoundException          When the service is not defined
     * @throws \Exception
     *
     * @see Reference
     */
    public function get($id, $invalidBehavior = ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE)
    {
        $id = strtolower($id);

        if ($service = parent::get($id, ContainerInterface::NULL_ON_INVALID_REFERENCE)) {
            return $service;
        }

        if (!array_key_exists($id, $this->definitions) && isset($this->aliasDefinitions[$id])) {
            return $this->get((string) $this->aliasDefinitions[$id], $invalidBehavior);
        }

        try {
            $definition = $this->getDefinition($id);
        } catch (ServiceNotFoundException $e) {
            if (ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE !== $invalidBehavior) {
                return;
            }

            throw $e;
        }

        $this->loading[$id] = true;

        try {
            $service = $this->createService($definition, $id);
        } catch (\Exception $e) {
            unset($this->loading[$id]);

            if ($e instanceof InactiveScopeException && self::EXCEPTION_ON_INVALID_REFERENCE !== $invalidBehavior) {
                return;
            }

            throw $e;
        } catch (\Throwable $e) {
            unset($this->loading[$id]);

            throw $e;
        }

        unset($this->loading[$id]);

        return $service;
    }

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$id = strtolower($id);