2FA Breaking Blog

My friend has been unable to use the blog since 2FA was released - he does not have it enabled because a bot uses his account for several group-related things. Even though he doesn’t have it enabled, he gets this error when viewing the blog:

As you can see - he does not have 2FA enabled:

I don’t have 2FA on yet, but can view the blog just fine. Has your friends tried clearing cookies and retrying?

Yeah, I’m not too sure why this happens for him.