Here's a permanent link to the new Discord:

https://discord.gg/nvVX9Wb

Features a bot,
Looking for group section,
Lots of resources,
And morrreeee!

It doesn't work.

The invite probably expired. Annoyingly, by default invites expire, and it's not instantly obvious.

Sorry I got back to this post so late, link has been updated with one that shouldn't expire