Snapshot plugin - Can't authorize app with Google

Hi there,

I'm trying to set up Snapshot on my WP multisite and can't get it to authorize with Google. I've added the redirect URI, client ID, client secret but whenever I try to "Authorize" I get a 401 page with an error message saying

"Error: invalid_client
no application name "

I didn't add any authorized javascript origins but I did blank out the field. I have rechecked and re-added the info a few times but was just wondering if someone could tell me which field it's having trouble with. I would like to get snapshot up and running before I update to WP 4.0.

TIA

Ingrid