Laravel 8: Undefined property: App\Notifications\ResetPassword::$queue - php

Question

I want tp apply queue for my Notifications, so I implemented that at my Notification which ResetPassword:
class ResetPassword extends Notification implements ShouldQueue
Then I ran php artisan queue:table and migrate it so the table jobs created successfully at the DB.
And also change the QUEUE_CONNECTION to database at .env file and re-run php artisan serve.
But when I test this and clicked on reset password link, a new table row must be added to jobs table but it does not.
And instead of that, this error returns:
ErrorException Undefined property:
App\Notifications\ResetPassword::$queue
...\notification\vendor\laravel\framework\src\Illuminate\Notifications\NotificationSender.php:195
So what is going wrong here ? How can I fix this issue ?
I would really appreciate any idea or suggestion from you guys...
Thanks in advance.
UPDATE #1:
ResetPassword.php:
<?php
namespace App\Notifications;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Notification;
use Illuminate\Support\Facades\Lang;
class ResetPassword extends Notification implements ShouldQueue
{
/**
* The password reset token.
*
* #var string
*/
public $token;
/**
* The callback that should be used to build the mail message.
*
* #var \Closure|null
*/
public static $toMailCallback;
/**
* Create a notification instance.
*
* #param string $token
* #return void
*/
public function __construct($token)
{
$this->token = $token;
}
/**
* Get the notification's channels.
*
* #param mixed $notifiable
* #return array|string
*/
public function via($notifiable)
{
return ['mail'];
}
/**
* Build the mail representation of the notification.
*
* #param mixed $notifiable
* #return \Illuminate\Notifications\Messages\MailMessage
*/
public function toMail($notifiable)
{
if (static::$toMailCallback) {
return call_user_func(static::$toMailCallback, $notifiable, $this->token);
}
return (new MailMessage)
->subject('subject goes here')
->line('This email is sent to you')
->action(Lang::get('Reset Password'), url(config('app.url').route('password.reset', ['token' => $this->token, 'email' => $notifiable->getEmailForPasswordReset()], false)))
->line(Lang::get('Until the next 60 minutes you can use this link', ['count' => config('auth.passwords.'.config('auth.defaults.passwords').'.expire')]))
->line(Lang::get('If you did not request a password reset, no further action is required.'));
}
/**
* Set a callback that should be used when building the notification mail message.
*
* #param \Closure $callback
* #return void
*/
public static function toMailUsing($callback)
{
static::$toMailCallback = $callback;
}
}

Answer 1

Look Like you have forgot to use Queueable Trait in your notification
use Illuminate\Bus\Queueable;
class ResetPassword extends Notification implements ShouldQueue
{
use Queueable;
Queueable trait has propety $queue
Ref:https://laravel.com/docs/8.x/notifications#queued-notifications-and-database-transactions