Laravel 11 - Private channel authorization failing after upgrade from Laravel 10

I recently upgraded my application from Laravel 10 to Laravel 11 using Laravel Shift. After the upgrade, I noticed that my private channels with Pusher are no longer authenticating. The error logs in Pusher's console are filled with "Auth info required to subscribe to private-users.2".

In Laravel 11's documentation, they omitted the bit about using an authorizer() function when setting up the Laravel Echo instance. I'm unsure if this is related, but I left it in for now. I confirmed that the call to "broadcasting/auth" is reaching the "Illuminate\Broadcasting › BroadcastController@authenticate" controller. However, the request never seems to reach the channel authorization callback. It returns an empty 200 response.

In my channels.php, I've set the channel as follows:

Broadcast::channel('users.{id}', UsersChannel::class);

Here's the UsersChannel:

<?php

namespace App\Broadcasting;

use App\Models\User;

class UsersChannel
{
    public function __construct()
    {
        //
    }

    public function join(User $user, int $id): array|bool
    {
        return (int) $user->id === (int) $id;
    }
}

I can see the channel listed when using the command "php artisan channel:list". I'm wondering if there's an implicit change in Laravel 11 that I'm overlooking.

I've confirmed that channels.php is present in the new bootstrap\app.php. I also ran the "php artisan install:broadcasting" command, so everything should be correctly registered after the update.

Solution found.

One of the changes in Laravel 11 included updating the environment variable for the default broadcast provider. The environment variable "BROADCAST_DRIVER" was changed to "BROADCAST_CONNECTION".

After updating that name everything worked as it did before.