The Add-on Developer stated Friday on ESOUI that:
"The server is currently offline due to some unexpected issues. But due to personal schedules I will not be able to look into this tomorrow and possibly day after tomorrow too.
Sorry for the inconvenience."
That's a great idea to donate to the addon authors of addons you use regularly. It takes a lot of time and resources to maintain an addon like this.I'm just going to wait patiently to sell stuff until the service is fixed. I realize how much I rely on this service and should probably make a donation.