Twitter, Github and normal username and password logins not working after upgrade

I set it to https earlier. But still, why would it affect normal username and password logins (which isn’t working either). Or Twitter?

I also just tried to rebuild one of the other forums… and that failed cos Could not resolve host: github.com; (which I guess is due to their current problems).

Can we switch this secure cookie update off via ACP or revert to an older version for the time being?

Edit: My set-up is detailed in this How To: How to set up Discourse on a server with existing Apache sites