Unable to embed wordpress blog to other website

What I am basically trying to do is embed a blog website on the main website as iframe. I am the one who is responsible for the blog website which is running on WordPress. The main website is being developed by other programmers using other platform. The programmers have attempted to embed the blog website using the following code

<div class= 'iframe'>
  <iframe name="ilaunchIframe" id="ilaunchIframe" src ="http://ilaunchvideo.0456bb0.netsolhost.com/"></iframe>
</div>

But they said they are getting the following error

Uncaught DOMException: Blocked a frame with origin from accessing a cross-origin frame

Why should I do to fix this?