Unreal 5.6 "Source Engine" Lacks windows SDK

Hey Everyone. i have a modified version of Unreal Engine 5.6, it works perfectly fine on all platforms except windows.

it keeps complaining about a missing Windows SDK.
I have installed everything you’d typically need via Visual Studio as well as the Windows SDK from Microsoft and so on.

The Launcher version works perfectly fine but the Source build does not work.

I’m mostly developing on Linux, but i do of cause need to be able to ship games for Windows.

Anyone has any sort of idea in relation to what could be wrong because i know all the required SDK’s and components for Windows is installed

the OS is Windows 10 Pro Workstation “64-Bit”