Marin, Thank you! I appreciate the feedback. Therefore, I will assume that my problem has nothing to do with the RxSwift progression to version 3.5.
However, there is this major issue (please follow the link below). At this point, I am stuck and shut down and disabled from doing any further development work:
https://forums.kodeco.com/t/chapter-2-observables-project-problems/27877/24
I would truly appreciate any help you can offer, since I have only just started reading the book…