I have Windows 10 same problem with graphics capable of dx12 and more and having the same pop-up trying to get the city example in the project just opening the example. I updated my driver tells me to do command line arguments, and apparently in the documentation of the 5.0, it doesn’t have that
The Radeon R9 280X was a performance-segment graphics card by AMD, launched on October 8th, 2013. Built on the 28 nm process, and based on the Tahiti graphics processor, in its Tahiti XTL variant, the card supports DirectX 12. Even though it supports DirectX 12, the feature level is only 11_1, which can be problematic with newer DirectX 12 titles.
get a new gfx card
city sample small works on my gtx 1060
it needs at least 6gigs of vram too, just for the small city.