title: TinyMce 4 + ResponsiveFileManager cross domain : Blocked a frame with origin
body: <p>Does anyone know how to make Responsive File Manager (<a href="http://www.responsivefilemanager.com" rel="nofollow noreferrer">http://www.responsivefilemanager.com</a>) work with tinyMCE 4 with a subdomain (crooss domain)?
  Their website says that it's possible to  do it, but I can't figure out how because I'm blocked with this message (Chrome console) : </p>
  
  <p>Uncaught DOMException: Blocked a frame with origin "mywebsite.local" from accessing a cross-origin frame.</p>
  
  <p>For info I want to store the images on a domain such as mywebsite.local and TinyMCE is on a subdomain : admin.mywebsite.local</p>
  
  <p>Here's my code :</p>
  
  <pre><code>    // TinyMCE
      tinymce.init({
      ...
  
      // Responsivefilemanager
      filemanager_crossdomain: true,
      external_filemanager_path:"http://mywebsite.local/filemanager/",
      external_plugins: { "filemanager" : "http://mywebsite.local/filemanager/plugin.min.js"},
  
      ...
   });
  </code></pre>
  
  <p>Please help it's been hours I'm trying to figure this out ! 
  Thanx !</p>