Editing last unit of a course and page freezes to where I can't even close the tab

I am having an issue editing the last unit of my "The Way of the SEAL" course on my site "http:trianing.unbeatablemind.com".

I have the latest version of coursepress and have deactivate all plugins and reverted to the default theme. Issue persists.

When I try to edit the last unit of my course the page will load its content and then freeze. It freezes so bad it crashes the Tab I have open to where I can't even close it without force closing my browser(Chrome). I have disabled all extensions and the issue still persists.

This issue is on a lot of my sites.

I have already granted access.