Maybe better with a link to https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/ as it's the actual tutorial and has all the content.
(insert vkrt_tutorial.md.htm here)
Looking at the source of the page, they are using some JS library called markdeep that seems to render the content, so if you don't have JS activated, it won't work. Similarly, overzealous or misconfigured adblockers would probably make it not work as well.
Just trying to help you out with figuring out what's wrong. If you don't want help or to fix the issue, maybe refrain from posting next time.