我已经安装了 Xcode 12 beta 2。我尝试在 Mac OS Catalina 上通过 Jenkins 运行我们的 xamarin 项目。它因以下错误而失败。当我从 Mac Visual Studio 构建相同的项目时，它成功了，没有任何错误。
SplashViewController.storyboard : error :
iOS 14.0 (14.0 - 18A5319g) - com.apple.CoreSimulator.SimRuntime.iOS-14-0 (unavailable, failed to open liblaunchsim.dylib) ==> not available:
Error Domain=com.apple.CoreSimulator.SimError Code=401 "The iOS 14.0 simulator runtime is not available."
UserInfo={NSLocalizedDescription=The iOS 14.0 simulator runtime is not available.,
NSUnderlyingError=0x7fef8847b520 {Error Domain=NSPOSIXErrorDomain Code=53 "Software caused connection abort"
UserInfo={NSLocalizedFailureReason=XPC error talking to SimLaunchHostService: <error: 0x7fff97d649a0> { count = 1, transaction: 0, voucher = 0x0,_
我还 …