XamlFiles parameter is not supported by XamlGtask

Question

I just loaded my xaml solution and tried debugging and I got these errors. Earlier in the day I updated my Xaml but I ran into errors with the corresponding Xcode version. I enabled the managed header and started to download the latest version of Xcode that I could (9.2) and that worked this morning, but it has now stopped working. Any ideas?

/Users/rehamathur/Projects/TestApp/packages/Xamarin.Forms.3.1.0.583944/build/netstandard2.0/Xamarin.Forms.targets(4,4): Error MSB4064: The "XamlFiles" parameter is not supported by the "XamlGTask" task. Verify the parameter exists on the task, and it is a settable public instance property. (MSB4064) (TestApp.iOS)

/Users/rehamathur/Projects/TestApp/packages/Xamarin.Forms.3.1.0.583944/build/netstandard2.0/Xamarin.Forms.targets(3,3): Error MSB4063: The "XamlGTask" task could not be initialized with its input parameters. (MSB4063) (TestApp.iOS)

Answer 1

A pretty important addition from the answer of "StephaneDelcroix" there

• make sure ALL of your project targets the same version of the XF nuget

I have reviewed my project and discovered that I have overlooked my PCL referencing old XF version. After upgrading and retargeting packages and following remaining steps the error was gone.