title: Silverstripe image gallery issues
body: <p>I am trying to install the image_gallery module for Silverstripe 3.0.3. I have already installed the dataobjectmanager and ran dev/build. All seems to be ok until i try to create a gallery page. I can see the option for image gallery page, but when i select it, I get a small popup saying internal server error.</p>
  
  <p>After checking the console, i get the following information:</p>
  
  <p><img src="https://i.stack.imgur.com/2ZBc9.png" alt="header info"></p>
  
  <p>I am working locally but cannot seem to get it to work correctly.</p>
  
  <p>Any idea how I can fix this?</p>