@anonymous_user_1267f45c - this again is the plugin revealing its origins as a component of UE for Xbox One XDK games. The ability to write Achievements is not part of the Xbox Live Creators Program.
@User-645081948 - do you have the Windows 10 SDK installed (preferably either 14393, or if you’re using VS2017, 15063)?
@xxValiumxx - a couple of ideas: be aware of the performance envelope for UWP on Xbox One. In particular, make sure you’re not exceeding the memory limit, and that you’re using the D3D11 RHI. Also, try running the Windows App Certification Kit (WACK) against your appx package; often that will highlight problems that can go unnoticed on Windows desktop, but that will limit your game’s ability to run on other UWP devices. Note that it’s expected that configurations other than Shipping use some unsupported APIs, so you may need to use a Shipping build to run on Xbox.