Running the Demo on my PC with a Ryzen 7 2700 and AMD RX 6600 I get a black screen with neon lights flying by and when zooming a door flashes in and out.
AMD latest graphics driver has issues when using Godot + Vulkan. You can try running the demo from the command line with the flag `--display-driver d3d12`
I heard about AMD drivers causeing problems with Godot + Vulkan, I'll change the project to run on DirectX 12. In the meantime, try to update your drivers to see if there's a new version that fix this issue.