Page will not show section elements

The builder will not allow me to add anymore elements and starts deleting already saved elements. In this case it's the photoboxes. It will allow me to create the section with all the content but when I save it deletes those photo boxes I created as well as others. I've updated the theme but that has not fixed anything.

• https://www.dropbox.com/sh/nqqn17k2yzcny9d/AACLWNS3bvlG4-2qz4cMsexQa?dl=0