Rider Xamarin iOS error "application bundle was not generated after deployment"

This happened to me today on Mac OS with the release of XCode 12.0, So what fixed it for me was to TOTALLY uninstall XCode and re down the last version I had installed, V11.6 from apple developers site https://developer.apple.com/download/more/?&name=Xcode. After that Rider will now run the iOS simulator as normal.

I guess the lesson learned is to not just update XCode until a few weeks, because I think Jetbrains need to catch up and release a newer version that works with the newer version of XCode. Of course if you need to test your app with the latest new version of iOS, then I guess you can still use VS for Mac as that still worked fine for me, but I need Rider to code, VS just doesn't do it for me at the moment

Update: I upgraded to XCode 12 today (3/10/2020) and all seems to be working fine..

Another possible work around if it doesn't work maybe: youtrack Jetbrains

Sorry, this is a known issue with the latest release (2018.1). Already fixed and waiting to be made public as part of 2018.1.1 later this month. The only current workaround that I know is to revert to 2017.3.

Tested today.

Download the last released version directly from their website.

Now is launching iOS devices.

Rider 2.2.4