Zoom scheduler not updating calendar

I just paid for Zoom scheduler after a free trial and linked a Microsoft 365 account calendar to it. Initially it seemed to work fine (during the free trial period) but now it is not updating my calendar at all. I have a meeting someone booked with me on Scheduler, and I received the email but no invitation and no calendar entry. I can't even save as a meeting, I have to recreate the event in my calendar and copy the entire message into it. This almost entirely defeats the purpose of paying for this product? I guess I can try removing and reconnecting the 365 integration, but Zoom says it is still connected. So frustrating to pay $100 for something that doesn't even work.