Xaml errors in Xamarin: all types not found

I designed an Android application on Adobe XD and through a plugin I exported all my assets to XAML.

I created a new project on Xamarin and immediately pasted the generated XAML in the MainPage.xaml file within the stacklayout. so like below:

Width="412" Height="778" Background="#0000" ClipToBounds="True" >
            




....

The problem is that anything I pasted in the layout is giving me the below error message:

I'm getting this for every component. Border, canvas, textblock, and even sub parameters like uid.

This is what i have at the top

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="DemoXAML.MainPage">

I'm not quite sure what I am missing