HybridWebView doesn't load Angular JS 2 App

Hello, folks.
I am facing a hard issue here. I've created an App which uses a Custom HybridWebView and the problems are below

1. On Android, I am able to invoke a JavaScript function to call my C# method properly right after the HybridWebViewRenderer loads, that's ok! However, my Angular app doesn't load, (it get stuck on "Loading" forever).
2. On iOS, my Angular App loads fine. However, I cannot invoke my JavaScript function on page load only if I click on a button.

I used this reference link to implement this.

do you guys have any advice, what can I provide in order to you guys try to help me?

and other question, How can I call a JavaScript function as a Callback using this implementation?

Thanks in Advance to you guys and best regards.

Giovanni