AJAX Upload file. Wordpress

ajax_uploadfile.js

 jQuery(document).on('click', '.save-support', function (e) {

                        var supporttitle = jQuery('.support-title').val();

                        var querytype = jQuery('.support-query').val();
                        var file_data = jQuery('#sortpicture').prop('files')[0];

                        var form_data = new FormData();
                        if (supporttitle == '') {
                            jQuery('.support-title').css({"border": "1px solid red"})
                            return false;
                        } else {
                            jQuery('.support-title').css({"border": "1px solid #e3ecf0"})
                        }

                        form_data.append('file', file_data);
                        form_data.append('action', 'md_support_save');
                        form_data.append('supporttitle', supporttitle);

                        jQuery.ajax({
                            url: '<?php echo admin_url('admin-ajax.php'); ?>',
                            type: 'post',
                            contentType: false,
                            processData: false,
                            data: form_data,
                            success: function (response) {
                                jQuery('.Success-div').html("Form Submit Successfully")
                            },
                            error: function (response) {
                             console.log('error');
                            }

                        });
                    });

                });

example_form.html

<form enctype="multipart/form-data">
   <input type="text" name="support_title" class="support-title">
   <input type="file" id="sortpicture" name="upload">
   <input class="save-support" name="save_support" type="button" value="Save">
 </form>

functions.php

 add_action( 'wp_ajax_md_support_save','md_support_save' );
  add_action( 'wp_ajax_nopriv_md_support_save','md_support_save' );


  public function md_support_save(){
       $support_title = !empty($_POST['supporttitle']) ? 
       $_POST['supporttitle'] : 'Support Title';

        if (!function_exists('wp_handle_upload')) {
           require_once(ABSPATH . 'wp-admin/includes/file.php');
       }
      // echo $_FILES["upload"]["name"];
      $uploadedfile = $_FILES['file'];
      $upload_overrides = array('test_form' => false);
      $movefile = wp_handle_upload($uploadedfile, $upload_overrides);

    // echo $movefile['url'];
      if ($movefile && !isset($movefile['error'])) {
         echo "File Upload Successfully";
    } else {
        /**
         * Error generated by _wp_handle_upload()
         * @see _wp_handle_upload() in wp-admin/includes/file.php
         */
        echo $movefile['error'];
    }
    die();
 }

I want to viewer upload image then i see this error "Specified file failed upload test."