无法添加软件包参考

Question

我正在VS Mac中构建Xamarin.ios应用程序。我正在尝试添加某个软件包，但是当我尝试添加它时，我会收到此错误，

jon@jons-MacBook-Pro-2 helloworld % dotnet add package Ditto                
/Users/jon/Desktop/hello-world/helloworld/helloworld/helloworld.csproj(140,5): error MSB4019: The imported project "/usr/local/share/dotnet/sdk/6.0.300/Xamarin/iOS/Xamarin.iOS.CSharp.targets" was not found. Confirm that the expression in the Import declaration "/usr/local/share/dotnet/sdk/6.0.300//Xamarin/iOS/Xamarin.iOS.CSharp.targets" is correct, and that the file exists on disk.
Unable to create dependency graph file for project '/Users/jon/Desktop/hello-world/helloworld/helloworld/helloworld.csproj'. Cannot add package reference.

我也尝试使用Nuget Manager，并且在尝试构建项目的

/Users/jon/Desktop/hello-world/helloworld/helloworld/MTOUCH: Error MT0009: Error while loading assemblies: /Users/jon/.nuget/packages/ditto/1.1.8/runtimes/win/native/dittoffi.dll. (MT0009) (helloworld)

任何想法时得到了这个错误？