Small problem with the plugin which I am guessing is probably something to do with permissions, but I can't find any documentation confirming what these need to be, so here goes:
The plugin seems to work fine except that when I click on the "My Shortcodes Builder" button within a post, the box that pops up is blank except for a 403 Forbidden message.
Any thoughts or suggestions please? I have the latest version 1.7 of the plugin. My website is here: