That's the first we've heard of that error. When the user logs out, they are also presented with the link to revoke access via Gmail. Sorry you weren't able to

That's the first we've heard of that error. When the user logs out, they are also presented with the link to revoke access via Gmail. Sorry you weren't able to get to that page. If you want to make sure that your data is deleted, we can do a manual delete of your metadata (if it exists on our server) for you. Just write to us at the address on the website.