How to get Slideshow option to show up?

According to #8 on this page : https://en.support.wordpress.com/images/gallery/#

We are suppose to be able to choose whether we want a slide show or other options. I’ve tested in both Safari and FF, both sites paulineantoinette.com and wherethehellarewe.com, and none of the options after random order are showing up.

And when I click on the images on my test post on wherethehellarewe.com all I get is a page that states content not found

https://wherethehellarewe.com/2012/12/23/test-2/

Where do I go to get this fixed?

Thanks