Crashes when running the app

I tried to run it on UWP as well as iOS and they build OK and starts running but crashes at:

file: Bikr.App.xaml.g.cs
in the function:

private void InitializeComponent():

When calling:
global::Xamarin.Forms.Xaml.Extensions.LoadFromXaml(this, typeof(App)); (line 19)

How to fix this?

Thanks, Danny

Reproduce the startup crash on UWP and iOS, then capture the exception and stack trace around Bikr.App.xaml.g.cs, InitializeComponent, and the LoadFromXaml call on line 19. Use that evidence to locate the failing XAML or initialization path; done means the sample starts successfully on both reported platforms.

Written by the indexing model from the issue text.