The plugin is great, no doubt, but useless with error Invalid Token.
I read the forum topic on your forum page where you have only one solution to this and it's to gave you access to the site so you will fix it.
I can't be happy with such solution. If you fix it I would never know what was fixed so I smell possible headaches on the theme and the plugin's update, maybe even on WP updates too and the same will happen with every other theme that I would use etc....
Is there any chance that you reveal what should be looked for and fixed in the theme?
I am using responsive free Mesocolumn theme for which I created a child theme and I suppose I know quite well the theme to fix it if you just give me the right direction.
I wonder if this same error and the same way to fix it happens to those using the pro version ?
I am considering upgrade, but need to have the free version working first without giving anyone access to my site (i.e. I need to understand what's the problem and to be able to fix it for every site)