Windows 10 N and Windows 10 K lack certain media features that are required for AirServer to run. These can be added to Windows 10 N or K by installing the Windows 10 Media Feature Pack. Without having the required Media Feature Pack installed, AirServer for Windows 10 (Windows Store) will not run and you will not be able to complete the installation of AirServer for Windows Universal.
The required Media Feature Pack can be found on the Microsoft website: https://www.microsoft.com/en-us/software-download/mediafeaturepack
Please note that it is important to install the Feature Pack that corresponds with the Windows 10 build/version you are using. To find out which build/version you are using, please go to Start - Settings - System - About. This will be either 1709, 1803 or 1809.