How do I Resolve Package System.Numerics.Vectors 4.5.0 Not Compatible with netstandard2.0, Xamarin?

Hi Everyone,

I need help with this issue. I recently installed VS 2019 Version 16.6.0 on a barely new computer. I am a newbie to Xamarin development.
I created a new Mobile App (Xamarin Forms) project, once the project has completed loading in Visual Studio, I get the following error:

Error NU1202 Package System.Numerics.Vectors 4.5.0 is not compatible with netstandard2.0 (.NETStandard,Version=v2.0). Package System.Numerics.Vectors 4.5.0 supports:
- monoandroid10 (MonoAndroid,Version=v1.0)
- monotouch10 (MonoTouch,Version=v1.0)
- netcoreapp2.0 (.NETCoreApp,Version=v2.0)
- uap10.0.16299 (UAP,Version=v10.0.16299)
- xamarinios10 (Xamarin.iOS,Version=v1.0)
- xamarinmac20 (Xamarin.Mac,Version=v2.0)
- xamarintvos10 (Xamarin.TVOS,Version=v1.0)
- xamarinwatchos10 (Xamarin.WatchOS,Version=v1.0) Holla \Projects\Mobile\Holla\Holla\Holla\Holla.csproj _1

This is strange as am new to Xamarin. I can't even build the project. I noticed in the solution explorer the screenshot below:

I tried to delete the Xamarin Essentials package from Solution Explorer and then re-installed using the package manage, it failed, popping up same error.
I have read a lot of online articles but, none could help to fix this problem. I will appreciate any assistance from the community please.
Thank you.