Queue gives [Symfony\Component\Debug\Exception\FatalThrowableError]

I am trying to run a beanstalkd queue but I get the error [Symfony\Component\Debug\Exception\FatalThrowableError] when I run queue listen

My code:

File.php
//Upload thumbnail
  public function uploadThumbnail($file, $id)
  {
      $extension = $file->guessExtension();
      $filename = 'thumnail_'.$id.'.'.$extension;
      if ($file) {
          $s3 = Storage::disk('local')->put($filename, $file);
      }
      $this->dispatch(new UploadImagesThumb($filename, $id));
  }
//Queue

protected $filename;
protected $id;

public function __construct($filename, $id)
     {
         $this->filename = $filename;
         $this->id = $id;
     }

    /**
     * Execute the job.
     */
    public function handle()
    {
        $qFilename = $this->$filename;
        $qId = $this->id;

        $image = Storage::disk('local')->get($qFilename);

        $s3 = Storage::disk('s3');
        $imageThumb = Image::make($image)->fit(320);
        //Always set thumbnail as jpg
        $imageThumb->encode('jpg');
        $s3->put("images/{$qId}/thumb/thumbnail.jpg", (string) $imageThumb, 'public');
    }