In the past . . . I'd say two weeks . . . I've had a number of failures of the desktop app to contact Tukui.org.
Each time that happened, I attempted to do so manually through Opera, Firefox, and my phone's browser (no idea what's on that one) while not connected to my home network.
Each time, Tukui.org showed as an unavailable site.
More than once I also used isup.me to determine that the site was down for more than just me. In each case, it was.
This happened again about an hour ago, maybe a little more. I lose track of time this late in the evening.
Is there an ongoing issue with your host? Should we be worried about losing you guys again? Is there anything we can do to help?
The issues with the site are known and are being investigated.
I always recommend backing up your WTF folder - where your profiles/settings for all addons, including ElvUI are stored.