The iOS designer no longer loads any xib or storyboard files for any project. It is stuck with the progress bar working indefinitely. My setup:
1. Windows 7 and Visual Studio 2017 Enterprise Version 15.4.5
2. Xamarin 220.127.116.11, Xamarin.iOS 18.104.22.168
3. Mac OS 10.13.1
4. XCode 9.1
What I have tried:
1. Restarting both machines
2. Cleaning (physically removing all bin and obj folders) and rebuilding
3. Deleting username/Library/Caches/Xamarin/XMA on the Mac and username\AppData\Local\Temp\Xamarin\XMA on the PC.
As of last week it was working fine and now it's broken. The only thing I'm aware of changing was the Mac installed a security update and rebooted. Also worth noting: the designer works fine in VS Community on the Mac, and on a different PC with Windows 10 and VS 2017.