Hi there Ryan,
Thanks for getting in touch with us, and sorry to hear about this issue.
EventBrite tickets can have a start/end sale dates, Have you checked on that? Also, are the events configured with the same timezone settings in EventBrite and the WP site?
Did this only affect specific events or all events in the site? Maybe the connection with EventBrite was lost or expired for some reason. Can you check on that as well in ‘Events > Settings > APIs’?
Best,
Nico
PS: I tracked your license down an confirmed you are a license holder. Please make sure to login before posting or replying next time 🙂