ProGallery Expand mode affects Page Code

I have a weird problem in a live site - When going to gallery expand mode, not only the next/previous are disabled, but when closing the Expand display the page resets and reloads.
This happens in most of my site pages, and started about 12 hours ago.
Is anyone familiar with such a problem, and how to fix it?
Thanks,
Ofer

This forum is for code related issues on your website and as Wix Pro Gallery is a Wix app, then you are better suited going through Wix Support for help
https://support.wix.com/en/article/contacting-wix-support