Addon approved on AMO but not signed

I uploaded this addon to AMO yesterday and submitted it for review today. It was approved, but Firefox gives me the “Firefox has prevented this site from installing an unverified add-on” message when I try to install it.

I did disable the version yesterday while working out the best way to package my source code for review, but the addon’s status is now approved and it’s up on AMO, so I would think it would be signed.

Is there a step or a setting I’m missing here?

I’ve resubmitted with a new version number, and this time it signed correctly.