Getting upload images to work correctly

I'm trying to create a form that can upload multiple images. The problem I'm having is that when I upload the image I get a

Symfony\Component\HttpKernel\Exception\NotFoundHttpException

and it isn't finding the folder that I would like the images to be.

I'm using hayageek jquery upload file plugin

http://hayageek.com/docs/jquery-upload-file.php

My form

<div class="container">
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            <div class="panel panel-default">
                <div class="panel-heading">
                    <h4>
                        Create Portfolio
                    </h4>
                </div>

                <div class="panel-body">
                    <div class="portfolio-form">

                        {{ Form::open(array('route' => 'portfolios.store', 'method' => 'post','files'=>'true' )) }}
                            {{ csrf_field() }}
                        
                            <div class="form-group">
                                <label for="title">Title</label>
                                <input type="text" id="title" class="form-control" name="title">
                            </div>

                            <div class="form-group">
                                <input type="file" name="image[]" multiple="multiple">
                            </div>

                            <div class="form-group">
                                <div id="fileuploader">Upload</div>
                            </div>

                            <input type="submit" class="btn btn-primary" value="Submit"></input>
                        {{ Form::close() }}
                    </div>
                    
                </div>
            </div>
        </div>
    </div>

    <script type="text/javascript">
        $(document).ready(function()
        {
            $("#fileuploader").uploadFile({
               url:'{!! asset("public/portfolio_images") !!}',
               dragDrop: true,
               multiple: false,
               showFileCounter: false,
               showDone: false,
               fileName: "myfile",
               allowedTypes: "jpg,png,gif,pdf",
               showDelete: true,
            });
        });
    </script>
</div>

the upload.php from hayageek

<?php
$output_dir = "uploads/";
if(isset($_FILES["myfile"]))
{
    $ret = array();
    
//  This is for custom errors;  
/*  $custom_error= array();
    $custom_error['jquery-upload-file-error']="File already exists";
    echo json_encode($custom_error);
    die();
*/
    $error =$_FILES["myfile"]["error"];
    //You need to handle  both cases
    //If Any browser does not support serializing of multiple files using FormData() 
    if(!is_array($_FILES["myfile"]["name"])) //single file
    {
        $fileName = $_FILES["myfile"]["name"];
        move_uploaded_file($_FILES["myfile"]["tmp_name"],$output_dir.$fileName);
        $ret[]= $fileName;
    }
    else  //Multiple files, file[]
    {
      $fileCount = count($_FILES["myfile"]["name"]);
      for($i=0; $i < $fileCount; $i++)
      {
        $fileName = $_FILES["myfile"]["name"][$i];
        move_uploaded_file($_FILES["myfile"]["tmp_name"][$i],$output_dir.$fileName);
        $ret[]= $fileName;
      }
    
    }
    echo json_encode($ret);
 }
 ?>

My controller

 public function store(Request $request)
    {

        $portfolio = new Portfolio();

        $request->validate($this->getRules());

        $portfolio->fill($this->getSafeInput($request));

        if($request->hasFile('image'))
        {
            $names = [];
            foreach($request->file('image') as $image)
            {
                $destinationPath = 'portfolio_images/';
                $filename = $image->getClientOriginalName();
                $image->move($destinationPath, $filename);
                array_push($names, $filename);          

            }
            $portfolio->image = json_encode($names);

        }
        
        $portfolio->save();
        
        return redirect()->route('portfolios.index');
    }

If I've left something out please let me know