Thank you so much for bringing this to my attention. It turned out to be an issue with macOS adding hidden indexing files (like .DS_Store) into the zip archive, which confused the browser player and caused it to lose track of the main .pck file on non-Mac systems. I have completely re-exported a clean build and updated the page. It should be running perfectly in the browser now. I would really appreciate it if you could give it another try when you have a chance. Thanks again