Still getting "Unknown Server Error" when trying to log into CC Desktop App

Hi -- I signed up for the early access file/font sync and received my email saying "You're In..."

When I used the link in that email to download the CC Desktop App and when I launch it, I'm still receiving the error "Unknown Server Error" Sign in is currently unavailable. We are unable to access your account. Please try again later.

Anyone run into a similar situation or have thoughts on how to remedy this?

Thanks in advance!

Kristina