From site's staff on their Facebook page:

Hello everyone!

I have been neglecting you all a bit recently, but that is mostly because things are running smoothly (no news is good news and all that).

The reason for this post is to let you know that sometime in the next 36 hours we will be migrating to a new server (bigger and better).

The migration should be fairly straight forward, but it will mean a brief downtime whilst we reboot the systems. This should only last 30-60mins so if you try to log in and can't then this is the reason and there is nothing to worry about and no need to report your failed log in!

Once the migration is complete there will inevitably be some small glitches. Please be patient whilst we check and tweak everything.

I am of course still available via private messages for log in problems etc. Don't forget to include your username and registered email in order to have your password reset.

Have a great weekend and stay safe, wherever you are!