GraphiQL explorer fails to sign in because of cross-site cookie being rejected

When trying to sign into GitHub from I get an error.

I see an error at the address

>The change you wanted was rejected.

>Maybe you tried to change something you didn’t have access to.

A cookie associated with a cross-site resource at was set without the SameSite attribute. It has been blocked, as Chrome now only delivers cookies with cross-site requests if they are set with SameSite=None and Secure. You can review cookies in developer tools under Application>Storage>Cookies and see more details at and

This is with Chrome 79 and the ‘SameSite by default cookies’ flag enabled, which will be the default in Chrome 80.