message: "(#324) Requires upload file"

<form id="postForm" name="postForm" ng-submit="createScheduledPost()" enctype="multipart/form-data">
<textarea ng-model="message"></textarea>
<div class="dropzone" file-dropzone="[image/png, image/jpeg, image/gif]" file="image" file-name="imageFileName" data-max-file-size="3">
  <span>Drop Image Here</span>
</div>
<div class="image-container">
  <img ng-src={{image}} ng-model="image" />
  <span class="file-name">{{imageFileName}}</span>
</div>

var app = angular.module('myapp');
app.controller('MyCtrl', ['$scope', function ($scope) {
    $scope.createScheduledPost = function() {
       FB.api("/"+pageID+"/photos",
         "POST",
         {
                "caption" : $scope.message,
                "source" : $scope.image,
                "access_token" : pageAccessToken,
                "scheduled_publish_time": time,
                "published": false
         },
         function (response) {
            console.log(response);
         }
      );
  }
}])