Xamarin Ios The App Has Been Terminated

I saw the hello forms label in the running app in the ios simulator on my mac build machine.
Xamarin ios the app has been terminated. With hockeyapp initialization it terminated without it launched on the device. I would never ever upgrade in the middle of a dev cycle unless to fix a critical framework bug. Visual studio 2019 xamarin ios the app has been terminated.
Steps to reproduce the repo app here is the simple file new xf m. I created the initial sample from the xamarin intro to forms. Business license on ios and android and developing from vs 2013.
Visual studio 2019 version 16 0 windows 10 0 debugger ide. The app app name has been successfully launched on ipad air 2 ios 9 3. Add comment 10 40000 characters needed.
I am all hooked up. I start ed the app and it ran fine on my mac. 0 solution multi project c native build is broken in vs2019 professional 16 0 3 0 solution setting a breakpoint within a ums scheduler thread main crashes the process 0 solution.
Visual studio 2019 xamarin ios the app has been terminated. So may be upgrading visual studio xcode xamarin ios operating system might be the problem. Xamarin ios applications can be debugged with the built in debugger in visual studio for mac or visual studio.
We allocate team time to evaluate upgrades before rolling out to the wider team. The app has been terminated. I have changed nothing other than the solution platform to debug on.