Are you sure you entered the post data correct?
For example if this is your steemit link:
https://steemit.com/steemit/@georgontech/announcement-steem-upvote-marketplace-get-free-upvotes
Authour must be:
georgontech

And permlink must be:
announcement-steem-upvote-marketplace-get-free-upvotes

Make sure you're not typing the whole link (I'm going to improve this in the next days)