Admin Backup Cron Jobs not ruing?

In the Admin Backup/Transfer section, I've created a Backup Cron job to run daily at 3am, however the cron job is not ruing.

In this same section under Create Backup, if I choose the "Now" option it will run the backup job successfully.

But the cron job is not ruing at night. And if I select the specific cron job and click Run Now, the cron job still does not run.

How can I determine what is going on?

Screenshot here:

Screen Shot 2017-07-27 at 11.30.24 PM.png