Sending notification failed

[malikdoksoz]

"laravel/framework": "^11.9.2",
"spatie/laravel-backup": "^9.0.3"
"laravel-notification-channels/telegram": "^5.0",

Sending notification failed to my telegram group.

My config/backup.php

use NotificationChannels\Telegram\TelegramChannel as TelegramChannel;

    'notifications' => [
        'notifications' => [
            \App\Notifications\BackupHasFailedNotification::class => [TelegramChannel::class],
            \App\Notifications\BackupWasSuccessfulNotification::class => [TelegramChannel::class],

            \Spatie\Backup\Notifications\Notifications\CleanupHasFailedNotification::class => [''],
            \Spatie\Backup\Notifications\Notifications\CleanupWasSuccessfulNotification::class => [''],

            \Spatie\Backup\Notifications\Notifications\UnhealthyBackupWasFoundNotification::class => [''],
            \Spatie\Backup\Notifications\Notifications\HealthyBackupWasFoundNotification::class => [''],
        ],

        /*
         * Here you can specify the notifiable to which the notifications should be sent. The default
         * notifiable will use the variables specified in this config file.
         */
        'notifiable' => \Spatie\Backup\Notifications\Notifiable::class,

        'telegram' => [
            'token' => env('TELEGRAM_BOT_TOKEN'),
            'chat_id' => env('TELEGRAM_CHAT_ID'),
        ],

app/Notifications/BackupWasSuccessfulNotification.php

<?php

namespace App\Notifications;

use NotificationChannels\Telegram\TelegramMessage;
use Spatie\Backup\Notifications\Notifications\BackupWasSuccessfulNotification as BaseNotification;

class BackupWasSuccessfulNotification extends BaseNotification
{

    public function toPushNotification($notifiable)
    {
        return TelegramMessage::create()
            ->content("backup successful")
            ->token(config('backup.notifications.telegram.token'))
            ->to(config('backup.notifications.telegram.chat_id'));
    }
}

php artisan backup:run --only-db failed!

> php artisan backup:run --only-db 

Starting backup...
Dumping database radiuscrm...
Determining files to backup...
Zipping 1 files and directories...
Created zip containing 1 files and directories. Size is 1.11 MB
Copying zip to disk named local...
Successfully copied zip to disk named local.
**Sending notification failed**
Backup completed!