instafeeed.js pulls back unknown for image file code example

Example: instafeeed.js pulls back unknown for image file

var feed = new Instafeed({
  get: 'user',
  userId: 'xxx',
  accessToken: 'xxx',
  template: '<a class="animation" href="\{\{link\}\}"><img src="\{\{image\}\}" /></a>'
})