Same issue here. The error log gives a good hint:
LogVulkanRHI: - Unsupported extension: VK_KHR_compute_shader_derivatives
This extension was introduced with a certain Vulkan version:
In Unreal 5.5.4 I get the current Vulkan API verion:
LogVulkanRHI: Display: Built with Vulkan header version 1.3.290
On Nvidia driver side:
August 30th, 2024 - Windows 553.02, Linux 550.40.71
I am using a 560.76 feature driver which was recommend for using Vulkan with HWRT. This driver could be still on that older Vulkan version.
In 5.6 I get:
LogVulkanRHI: Warning: Found VULKAN_SDK=
LogVulkanRHI: Display: Built with Vulkan header version 1.4.304
I also get a pop up message for DX12 that SM6 is not supported. So it seems to be not only a Vulkan issue here.
Also the Vulkan SDK cannot be found.
So maybe we need to upgrade to latest driver for testing.