There are no pending SQS messages to your test controller (nor to any other controller, at this moment).  Either a long-standing failure to launch proxies or having killed the cloudmaster (which we did at some point) could have caused this.  Anyway, depending on how central or tangential this issue is for you, you can manually set the fallbackForNewInvitees for the inviter in the GAE web interface to either null (in which case a new proxy will be launched next time an invite is authorized for this inviter) or to the (String) instanceId of an existing LanternInstance entry in that controller for which isFallbackProxy = true.

The quickest way to reprocess that invite might be to set its status to `queued` and approve it in the admin interface.