It appears there's server maintenance going on and no time frame for when it will be back up.
QuoteThank you for visiting Simple Machines!
We're currently performing maintenance on our server stack.
This outage will last for a period of time, please check back later.
Thank you for your patience and understanding.
Yep they are fixing the lag issue that has been going on the past few weeks.
Edit : They are back up and running. Still working on some quirks though.