Reported by Jamjardavies on Gitter.
Detail from Gitter
”Okay in my tests on a new project, I've added a "Content Scroll Snap Horizontal" from the create menu, and then removed the 5 children it comes with. I get no errors until I play and stop, to which I notice the
ContentScrollSnapHorizontal has set it's enable to false. Upon enabling this component in the editor (in edit mode, not play mode), I start getting error spam in the console. Also, when adding children to the content using Awake, it works, but if I delay it (in Start for instance), it then doesn't work or snap. What I seem to need to do is enable the snap, and update the layout, but this still causes an exception, since there's no children at the start.”