Demo project is broken

[graemesi]

When building and running the demo project on Xcode 12.0 and iOS 13.5 or iOS 14.0:

1. The Xcode debug console is filled with "Unable to simultaneously satisfy constraints" messages
2. None of the child view controllers are shown and the six buttons at the bottom of the view don't work
   It looks like this was broken by the v1.4.1 release

[chienplee]

Having the same issue.

[gluonfield]

same issue, application is in infinite autolayout loop

[malcommac]

Fixed in 1.4.2. thanks!