I got this error after subbing via paypal - annual subscription:
Maybe it's not set up yet for the new site? I've been using ElvUI for a couple years now. This is my first time donating.
Old site redirect not updated for new site it will be fixed later tonight. If you subbed don’t worry we got your subscription.
Don't commit on master when drunk.
Thanks for letting us know and your support
I always recommend backing up your WTF folder - where your profiles/settings for all addons, including ElvUI are stored.