All was well before the upgrade. Upgraded to support required iOS 13 SDK.
I updated VS 2017 Pro: VS 2017 Pro (15.9.21)
I had to update the Mac OS : Mac macOS Catalina
I updated Xcode: Xcode 11.4 (11E146)
I can connect fine to the Mac build host
The app compiles
The Remote Simulator to Windows just showed a blank screen
At some point, I did see the app running on the simulator on the Mac, but that does not seem to work anymore.
I tried a brand new project
I uninstalled and reinstalled XCode
I am not getting consistent errors.
Story Board editor will not load.
Will not run on device
When I try to run on the simulator, it just get the MT1008 error (see below). Fix for that did not work.
I cannot compile my original project.
The app has been terminated.
Launch failed. The app 'App1' could not be launched on 'iPhone 11 Pro iOS 13.4'. Error: error MT1008: Failed to launch the simulator: NSInvalidArgumentException: -[SimDevice registerNotificationHandler:]: unrecognized selector sent to instance 0x7fafa6dde890. Please check the logs for more details.
The app has been terminated.
I have tried several things in posts on that I have found. Noting seem to work.
As noted, I can connect to the Mac build host fine.
Been working on this for about 8 hours. Any suggestions would be greatly appreciated.