Hi!
In MyLocations chapter in page 212 you forgot to mention that we also have to add the key “Privacy - Camera Usage Description” (or NSCameraUsageDescription) in order the app to work.
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Yes, this is a mistake. 
It will be fixed in the next update. 
I got stuck there too and eventually found the solution at Techotopia. I wish I could have found the answer here, but couldn’t seem to find it easily - I found it only after attempting to post a new topic about this problem, and then the system pointed me to this post. I wouldn’t mind some pointers on how to search the forum more easily. Thx - everything else in the Tutorial has been great!