getting 404 on github says like github pages

On github webpage, getting 404 error on search, topics, trends, …etc all of the pages excpet main page of github.

It sometimes go back to normal, but lots of times, no.

and it says it is on github pages…

On fedra, firefox 69.0.1

We are not experiencing any outages, please reach out to us at git.io/c and we’ll take a look.