I think there's some text missing from the "Character Customization menu" section. The third paragraph starts just with "customization" and seems to be missing some part of the sentence before that.
Thanks for letting us know. I've logged it to fix it in the next update.
I also believe that UISpriteSelector should actually be UICharacterCustomizer in this section:
"In the image above, we anchored UISpriteSelector in the top-right corner using the Layout menu.Create a new script for UISpriteSelector"