What could be the problem?
Too old krpano version!
You're using version 1.20.2.
I would always recommend using the latest krpano version.
The main reason for not working in your case is that Oculus had removed the WebVR API and replaced it with the WebXR API.
And WebXR API support was first added in version 1.20.3:
https://krpano.com/news/#news1203