Scheduled a meeting using time slots, but no code is being generated in the email

I'm troubleshooting a problem I've recently been having:

When a client picks a timeslot on my scheduler, they get a confirmation email for the meeting but NO code is generated for the future slot. It just started happening in the past couple of days. I'm on a paid account. Any ideas of what's going on? The zoom app picks up that they are happening, but again, no meeting code is sent out with the confirmation- I don't get one either. 

https://i.imgur.com/yiKMYPP.jpg