Hi Mary,
Thanks so much for reaching out!
As a first troubleshooting step, could you please provide us with your complete system information in a private reply using the instructions found in the following link?
https://theeventscalendar.com/knowledgebase/sharing-sys-info/
Does this occur on all of your events? Can you provide me with a screenshot of how your event and ticket are set up on the backend of your site, on the Edit Event page?
Let me know if you have any other questions in the meantime!
Thanks,
Jaime