Cannot sync online endnote library to desktop app

I’ve just downloaded EndNoteX9 to my new laptop however when I sign into my account to sync nothing happens?

When I click on enable sync in preferences it comes up with the “Authorizing…” loading bar, does that and then closes. There is no file path in the bar under “Sync this EndNote Library” and I can’t add one. 

How do I get my library into my desktop app? Please help!!