Here's the full link,it was cut off within the snap-shot: https://steemit.com/@impactn-donation/steem-and-gaia-draper-university-hackathon-how-to-incentivise-social-impact-by-using-steem-blockchain
What's wrong with it? Here is what it says before I submit the proposal and receive the error message, Thanks for your help.
Trying it with steempeek interface and full url, it looks like this:


Hive account@jarvie Seems like other have had the same issue already, maybe worth an entry for the FAQ if there is a simple work-around.