Hi @BSFC,
Thank you for reaching out to us. I checked your site and I noticed you’re using an outdated version of Pro, always make sure to update your theme and plugins as many bugs are addressed in the latest releases. You can find the latest version numbers here: (http://theme.co/changelog/) Then you can compare them to what’s installed on your site.
If you find anything to be out of date, you can review our update guide.
If this doesn’t help then please check your content for a missing HTML tag in your modal content. This usually happens when there is an unclosed HTML tag in the content.
If you still have problems kindly get back to us with the result of the steps above and URL/User/Pass of your WordPress dashboard using the Secure Note functionality of the post to follow up the case.
Thanks!