I’m sorry to hear about the error while you’re customizing your site. I checked out the website link you sent privately, but it’s in maintenance mode so I couldn’t see very much information.
One thing I could see is that you’re using W3 Total Cache to speed up your site. It’s possible you may be seeing a cached version of your page after you publish, so be sure to clear your cache in Performance > Purge All Caches.
Beyond that, it’s tough to speculate without some more information. If you can, it’d help us out a lot if you can check your browser console for any errors you see while you’re publishing. Here’s a video I made to walk you through that, it’s a lot easier than it sounds!