Queued emails aren't sending

I have a set of emails that are queued to go to contacts later because of the contact limits I set, but those queued emails don’t appear to be sending. Any thoughts on what could be going on?

I have contact limits set to 1 email per day. It’s been over 24 hours since the last email was sent to any of the contacts currently in the queue to receive the next email but nothing is happening

Could this have something to do with the Cron Jobs? Or is there a setting I need to adjust for this?