Pusher trigger() method is giving error 500

So I was building chat functionality in laravel for a website using Pusher , everything was working fine till yesterday. But when I run the chat module again, I found out that trigger() method is giving error (Internal server error). `

use App\Http\Controllers\Controller;
use App\Model\Chatting;
use App\Model\Seller;
use App\Model\Shop;
use Brian2694\Toastr\Facades\Toastr;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use App\Events\Message;
use Pusher\Pusher;
class ChattingController extends Controller
{
    public function seller_message_store(Request $request)
  {
    //return 'hello';
    if ($request->message == '') {
        Toastr::warning('Type Something!');
        return response()->json('type something!');
    } else {
        $shop_id = Shop::where('seller_id', auth('seller')->id())->first()->id;

        $message = $request->message;
        $time = now();

        DB::table('chattings')->insert([
            'user_id'        => $request->user_id, //user_id == seller_id
            'seller_id'      => auth('seller')->id(),
            'shop_id'        => $shop_id,
            'message'        => $request->message,
            'sent_by_seller' => 1,
            'seen_by_seller' => 0,
            'created_at'     => now(),
        ]);
    //return auth('seller')->user()->seller_plan_id;
    if(auth('seller')->user()->seller_plan_id>2){
     // pusher
     $options = array(
        'cluster' => 'ap2',
        'useTLS' => false
    );
    $pusher = new Pusher('app auth key','app secret','app_id',$options);
    //return $request->user_id;
    $data = ['from' => auth('seller')->id(), 'to' => $request->user_id,'message'=>$request->message]; // sending from and to user id when pressed enter

    $pusher->trigger('channel-name', 'event', $data);//here is the issue
    }

        return response()->json(['message' => $message, 'time' => $time]);

    }
  }
}

`

If I comment out the trigger line, it gives no error. It was working completely fine till yesterday.

The version 5.0 of pusher is broken and has given me errors in the past.

What you could do is, change

"pusher/pusher-php-server": "5.0"

to

"pusher/pusher-php-server": "^5.0"

And then run the command composer update