Error with Pusher in Laravel React "not foud pusher"

I'm working on a Laravel application that uses Pusher for real-time event broadcasting. I keep encountering this error in BroadcastManager when trying to access the /broadcasting/auth route: Class 'Pusher\Pusher' not found http://localhost:8080/broadcasting/auth

The package appears to be installed correctly, confirmed with: composer show pusher/pusher-php-server

My config/broadcasting.php :

'driver' => 'pusher',
'key' => env('PUSHER_APP_KEY'),
'secret' => env('PUSHER_APP_SECRET'),
'app_id' => env('PUSHER_APP_ID'),
'options' => [
'cluster' => env('PUSHER_APP_CLUSTER'),
'useTLS' => true,
],
],```

I have change my route in my config/app.php :

```App\Providers\BroadcastServiceProvider::class,```


My version :
"pusher/pusher-php-server": "^3.0",
"laravel/framework": "^7.29",

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