なにもしてないのにXcodeがこわれた： An error was encountered while running (Domain = LaunchServicesError, Code = 0)

• ios - Unable to run app in Simulator: An error was encountered while running (Domain = LaunchServicesError, Code = 0) - Stack Overflow
• ios - Installation Failed "Invalid argument" when trying to run Today application extension - Stack Overflow

なおった

• cmd + shift + k
• reset simulator settings
• remove from Xcode
  • Xcode：プロジェクトの完全削除 | Xcode | asky

rm -rf myproject
git clone git@github.com:otiai10/myproject.git
open myproject.xcworkspace

rm -rf 最強説