Your build host version of Xamarin.IOS (release NO.)is too recent to work with the IOS designer
Encounted such error in VS after I update the xamarin at Mac side.Here is the solution for u to reference:
Open VS ->Tools->Options->Xamarin->IOS Settings
Click 'Check Now' to update VS side's Xamarin part to same version with Mac side
EXEC dbo.success '坚持','细心','计划'