Hmm I think you’re missing one picture. The pin description seems to point to the resolve auto layout button and the align description to the pin button
It’s hard to believe a tutorial could start out so wrong. Even beginners can read it and know it’s faulty. How is it that experts couldn’t spot the errors after it was published? Not very professional.
More issues:
Select Main.storyboard and make sure that Use Auto Layout, Use Trait Variations, and Use Safe Area Layout Guides are all enabled via the Storyboard’s File Inspector:
In Xcode 9.1, Main.storyboard does not have those choices in its File Inspector.