Im getting this error ('Response not JSON') every time I open a template in admin and every time I save a file. If I ignore the popup all is running as expected. However I would like to know what it means so I can fix it. On the forum Ive noticed sometimes (not all the time intermittently ) it loads a blank page and if I refresh it loads as expected not a major issue but annoying, Im wondering if these things are related. I don't think this is a bug its something Ive done as Ive made lots of changes Just would like to know what it means.