Having issues downloading a file Amazon s3 on production

I have been able to successfully save the files on Amazon s3 bucket but I am having issues when I try to download files from the s3 bucket. I get the below error when I click the download button.

AssignmentController

public function store(Request $request)
    {
        $this->validate($request,[
            'name' => 'required',
            'file' => 'required|max:2048',
            'task_id' => 'required'

        ]);

        $assignment = new Assignment;
        if($request->hasFile('file')){
            $file = $request['file'];
            $ext = $file->getClientOriginalExtension();
            $filename = uniqid().'.'.$ext;
            $filePath = 'assignments/' . $filename;
            Storage::disk('s3')->put($filePath, file_get_contents($file));
            $assignment->file = $filename;
            $assignment->save();

        }

DownloadController

    public function assignmentdownload($id){
        $file = Assignment::find($id);
        # Filename
        $filename = $file->file;
        $pathToFile = Storage::disk('s3')->url($filename);
        return Storage::download($pathToFile, $filename);
    }

via Chebli Mohamed