NSSoftLinking - The function 'SLSIsSuppressedByScreenTime' can't be found in the (null) framework

Question

On macOS Catalina (beta), I create a fresh macOS project in Xcode 11 (beta).

In the creation wizard I select Objective-C, and \"Use XIBs\".

If I run the proj

Answer 1

For me this error wasn't really the problem that lead to a crash. It read further down in the log:

_GSRegisterPurpleNamedPortInPrivateNamespace Couldn't register
  maccatalyst.xxx.gsEvents with the bootstrap server. 
Error: unknown error code (1100).
  This generally means that another instance of this process was 
  already running or is hung in the debugger.

For me the problem was solved by looking at the running processes and killing another instance of my app that was still somehow running.