Getting error when opening a private repo

[adamyonk]

When I with to GitHub and try to open a private repo I get this error:
It doesn’t seem to happen if I try to open one of my other public repos.

[joyceerhl]

I am not able to reproduce this behavior. Does this occur for you in all browsers or specific ones? Do you have a firewall preventing us from connecting?

[adamyonk]

I've tried Safari in iOS and macOS and Chrome on macOS. Here's the request in Safari:

I'm just on my home network, so no firewall, I've also tried it on my cellular connection (Verizon).