by Erin Billy.
Funny, I got this error again, and Google brought me to my own post.
Here's what I just did to fix it; not sure whether it'll work in every case:
Try restarting from the very beginning. In 2. Initial settings, check ALL options. (Don't worry, you won’t import them all.) When you get to 3. Schema settings, check the ones that you want to import.
Hope that helps.