I suddenly started getting error messages like this on an iPhone app I'm developing under VS 2017 (15.7.4):
File not found: /Users/mark/Library/Caches/Xamarin/mtbs/builds/iPhoneRide/50bab16523556b11bd69dd3e7138b995/Assets.xcassets/AppIcons.appiconset/Icon152.png
For fun, and a lack of being able to think of anything else to try, I went into the Mac that's acting as my build server and deleted everything under /Users/mark/Library/Caches/Xamarin/mtbs/builds/iPhoneRide. The problem still occurs when the solution is rebuilt.
How do I fix this? And what's causing it (so I can avoid running into it in the future)?