Daemon crash

[samdgea]

Hi, i'm currently trying to implement your library to my project.
I'm use PostgreSQL as my database connection and got this error message

PHP Notice 'yii\base\ErrorException' with message 'unserialize(): Error at offset 112 of 116 bytes'

in /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/bazilio/yii2-async/transports/AsyncMysqlTransport.php:88

Here's the stack trace
Stack trace: #0 [internal function]: yii\base\ErrorHandler->handleError(8, 'unserialize(): ...', '/Users/samdgea/...', 88, Array)
#1 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/bazilio/yii2-async/transports/AsyncMysqlTransport.php(88): unserialize('O:46:"YarCode\\Y...')
#2 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/bazilio/yii2-async/AsyncComponent.php(48): bazilio\async\transports\AsyncMysqlTransport->receive('mailer', false)
#3 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yarcode/yii2-async-mailer/src/MailerCommand.php(24): bazilio\async\AsyncComponent->receiveTask('mailer')
#4 [internal function]: YarCode\Yii2\AsyncMailer\MailerCommand->YarCode\Yii2\AsyncMailer\{closure}(Object(React\EventLoop\Timer\Timer))
#5 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/react/react/src/EventLoop/Timer/Timers.php(90): call_user_func(Object(Closure), Object(React\EventLoop\Timer\Timer))
#6 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/react/react/src/EventLoop/StreamSelectLoop.php(177): React\EventLoop\Timer\Timers->tick()
#7 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yarcode/yii2-daemon/src/DaemonCommand.php(25): React\EventLoop\StreamSelectLoop->run()
#8 [internal function]: YarCode\Yii2\Daemon\DaemonCommand->actionDaemon()
#9 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#10 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#11 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yiisoft/yii2/console/Controller.php(148): yii\base\Controller->runAction('daemon', Array)
#12 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yiisoft/yii2/base/Module.php(528): yii\console\Controller->runAction('daemon', Array)
#13 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yiisoft/yii2/console/Application.php(180): yii\base\Module->runAction('mailer/daemon', Array)
#14 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yiisoft/yii2/console/Application.php(147): yii\console\Application->runAction('mailer/daemon', Array)
#15 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/vendor/yiisoft/yii2/base/Application.php(386): yii\console\Application->handleRequest(Object(yii\console\Request))
#16 /Users/samdgea/Documents/Workspace/Yii2/sipk-yii2/yii(20): yii\base\Application->run()
#17 {main}

Here's my code
private function _sendVerificationEmail($user, $subject = "Please validate your account")
{
$message = Yii::$app->mailer->compose()
->setFrom('[email protected]')
->setTo($user->email_address)
->setSubject($subject)
->setTextBody("Hi, this is your verification code: " . $user->email_verification_hash . "\nPlease ignore if you did not request it");
return Yii::$app->mailer->send($message);
}

and this is my configuration file
$config = [
....
'mailer' => [
'class' => \YarCode\Yii2\AsyncMailer\Mailer::class,
'syncMailer' => [
'class' => yii\swiftmailer\Mailer::class,
'useFileTransport' => true,
'transport' => [
'class' => 'Swift_SmtpTransport',
'host' => 'smtp.mailtrap.io',
'username' => 'xx',
'password' => '9xx',
'port' => '2525',
'encryption' => 'tls',
],
],
],
...
];