Class "string" does not exists - put email Transport Object into RabbitMQ queue

[rock_lin]

Magento 2.4.4-p1 EE

PHP 8.1.7

I want to put email Transport Object into RabbitMQ queue.

communication.xml

<topic name="my_topic" request="Magento\Email\Model\Transport\Interceptor"/>

queue_publisher.xml

<publisher topic="my_topic">
    <connection name="amqp" exchange="my_exchange"/>
</publisher>

queue_topology.xml

<exchange name="my_exchange" type="topic" connection="amqp">
    <binding id="MyTest"
             topic="my_topic"
             destinationType="queue"
             destination="my_destination"/>
</exchange>

queue_consumer.xml

<consumer name="my_test.consumer"
          queue="my_destination"
          connection="amqp"
          handler="handler::process"/>   

Test with Magento CLI

app/code/Vendor/Module/Command/TestQueue.php

use Magento\Framework\Mail\Template\TransportBuilder;
use Magento\Framework\MessageQueue\PublisherInterface;

$this->transportBuilder->setTemplateIdentifier(
    $this->scopeConfig->getValue(
        self::XML_PATH_TEST_TEMPLATE,
        ScopeInterface::SCOPE_STORE
    )
)->setTemplateOptions(
    [
        'area'  => FrontNameResolver::AREA_CODE,
        'store' => Store::DEFAULT_STORE_ID,
    ]
)->setTemplateVars(
    [
        'number'   => $number
    ]
)->setFromByScope(
    $sender
)->addTo(
    $recipient
);
$transport = $this->transportBuilder->getTransport(); 

try {
    $this->publisher->publish('my_topic', $transport);
} catch (Exception $e) {
    $this->logger->critical($e);
    $output->writeln(sprintf('<error>%s</error>', $e->getMessage()));
}
$transport->sendMessage();

After execution, an error message and Queue has no data

Class "string" does not exist

Any ideas? Cheers!