Hi alexfloren,
if you go in text mode editor (the standard WP editor), not the visual, and look at the source code, you should see something like the following code:
<div class=”zedity-iframe-wrapper aligncenter” style=”max-width:600px;max-height:600px” data-origw=”600″ data-origh=”600″><iframe class=”zedity-iframe” src=”http ://localhost:8578/wordpress/wp-content/uploads/2013/12/test.html?_dle2y6ns” width=”600″ height=”600″ scrolling=”no” data-id=”96″ title=”sky”></iframe></div>
Make sure that the text in bold that appear after “src=” (i.e. http: //localhost:8578, in the example above, but in your case can be different) is the same than then the first part of the address that you have in the browser address bar (if they are not the same then the browser believes you’re doing a cross-domain call and it does not allow it). In other words, the domain in the iframe and the one in the browser address bar must be the same.
If you cannot figure it out please send us a screenshot of the WordPress editor in text mode where we can see the browser address bar and the code and will assist you in getting this one fixed, it’s very simple. You can email us at info @ zedity.com or post at https://zedity.uservoice.com (we’ll reply within 24 hours).
Thank you for using Zedity.