Footer in docs, error from Github

[DanRJ]

Description

When I click on one of the two links to Github in the footer, I get this error message.
I suspect the page is not redirecting me (the user) to Github, instead the page is fetching the data.
See image for error

@erlendoksvoll got the error aswell, then he visited Github and came back to the page and it worked.

Steps To Reproduce

1. Go to https://data.altinn.no/ in incognito mode
2. Click on one of the links in the footer
3. See the error