Hello,
I tried clearing the cache and cookies, I tried another browser and I have the latest versions and did not see a change however, yesterday I dunno what happened a divine force or something it actually worked for like an hour or two I managed to try it out with some pages, as I was going to do the last page it got back to the same error screen and stopped showing anything. Typical coding behavior, I dunno why it stopped working and I don’t know why it worked, I literally have no answer, now if you tell me where can I find the javascript error I would screenshot it to you but I have no idea how to troubleshoot this, without breaking anything of course.