You're right, I could not find a way to run this, whatever version of XCode I used. It is very unfortunate.
Message is slightly different, but same problem:
Module compiled with Swift 5.1 cannot be imported by the Swift 5.1.1 compiler: Swift_Playgrounds_Author_Template_for_Xcode_11.1/Template/SupportingContent/PlaygroundsFrameworks/iphonesimulator/PlaygroundSupport.framework/Modules/PlaygroundSupport.swiftmodule/x86_64-apple-ios-simulator.swiftmodule
Problem is PlaygroundSupport exec in PlaygroundSupport.framework
That's why we need urgently Swift birai API stability, promised a long time ago…
See also:
https://stackoverflow.com/questions/58654714/module-compiled-with-swift-5-1-cannot-be-imported-by-the-swift-5-1-2-compiler
I fear the best option is to file a bug report.
I finally found an XCode version that builds it: XCode 11.0 (specifically 11.0 GM2, build 11A420a). I could select the target LiveViewTest.app to launch in simulator.
Readme states:
The supporting content included with this template, including these frameworks, requires Xcode 11.1 to build. Attempting to use this template with another version of Xcode may result in build errors.
May be you can download this XCode 11.1 (reported as very buggy on the other hand) in download/More