So I am here with the 2 simplest tricks to get rid of it.
1. By deleting “&theaterâ€
To disable the new Photo Viewer simply go to the address bar of the browser. At the end of the address, there is &theater – delete it. The page will reload the image in the old photo viewer and from there you can click next and back for each picture and it’ll stay in the old viewer, you only have to do this each time the new photo viewer displays then it will stay at the old viewer until you click off the page.
2. Using F5 key.
All you have to do is to simply press F5 button and then the photo should load again in the old Photo Viewer instead of the new one and after this you will see the rest of the photos in the album in the old Photo Viewer.