Bookings not sending invitations nor reminders

Hello, I am using bookings to set meetings with staff. I have it set up where up to 3 people can sign up with me at a given time. 

The booking process works great. People are able to sign up. It chooses from both my available time as well as a limited window each morning where I want to conduct these meetings. Users are saved in the bookings calendar.

what is NOT working is that the users receive no confirmation nor meeting invite. I get a calendar invite, but they do not. I also have email reminders set up and they do not get those either. I am having to daily send them a calendar invite with the teams link that was generated.