Unhandled exception: System.ComponentModel.Win32Exception (0x80004005): The specified executable is not a valid application for this OS platform

Trying to learn Xamarin . Created a blank app and tried to run on Xiaomi Redmi note 7 (Android 9 - API 28). Target framework in ANDROID 9 got this error

Unhandled exception: System.ComponentModel.Win32Exception (0x80004005): The specified executable is not a valid application for this OS platform.

Tried to repair the Sdk still no help.IDE used VS 2019

also got the following errors jarsigner error: java.lang.RuntimeException: keystore load: C:\Users\User Name\AppData\Local\Xamarin\Mono for Android\debug.keystore (The system cannot find the path specified)

and