Solved Is Vulkan supported on the radeonkms kernel module?

I want to install a Vulkan SDK on FreeBSD. I tried installing almost every package listed in the last post of this thread using this Linux Vulkan installation tutorial as a guide on a Radeon HD 6310, which uses the radeonkms kernel module. The packages installed successfully, but starting vulkaninfo results in this error:
vkEnumerateInstanceProperties failed with ERROR_INITIALIZATION_FAILED ...

Trying to launch vkcube-wayland results in:
Assertion failed: (!err), function demo_init_vk ...

I'm using Sway as my window manager, so I'm not sure if this is an issue related to this thread.

I'm pretty new to all of this, so any basic troubleshooting tips would be more than welcome.