Compiling errors everywhere!!!

[freezersharp]

1. Downloading the solution, open it and compile it: namespace missing. I had to add manually this:

using MarcTron.Plugin.CustomEventArgs;

2. Cannot compile for iOS:

C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\MSBuild\Xamarin\iOS\Xamarin.iOS.Local.targets(109,3): error : Could not find a part of the path 'C:\Users\PC\AppData\Local\XamarinBuildDownloadCache\GAppM-6.4.1\Frameworks\GoogleAppMeasurement.framework\GoogleAppMeasurement'.

3. If I update all the nugets (this project uses Xamarin Forms 4.6), I get another errors:
   An error occurred: 'Object reference not set to an instance of an object.'. Callstack: ' at TestMTAdmob.iOS.AppDelegate.FinishedLaunching (UIKit.UIApplication app, Foundation.NSDictionary options) [0x00007] in C:\Users\PC\Desktop\TestMTAdmob-master\TestMTAdmob\TestMTAdmob.iOS\AppDelegate.cs:23

Xamarin.PreBuilt.iOS[288:11646] Xamarin.iOS: Unable to locate assembly 'Xamarin.Forms.Xaml' (culture: '')

4. I read about another requirement, the Xamarin.Google.iOS.SignIn package. I've installed it but it doesn't work neither.

[gsgou]

@freezersharp there is a project update merged with MTAdmob 1.6.9 and XF 5.0