Hi sorry for the issues.
I am here to help though!
Thanks for the information on the theme and moving to staging to for testing.
I went to the Event and did not see any errors so lets start with this.
I have a bunch of questions that to help get to the bottom of this .
Please check in Products and see if the ticket you created in the Event is there.
Also, Please go to the Event you created the ticket and confirm it is listed there and let me know the times you setup for the ticket’s to be on sale (if not date please let me know that).
Have you looked at New User Primer for WooCommerce Tickets? (it could help you see all the features if you have not)
https://theeventscalendar.com/support/documentation/wootickets-new-user-primer/
Let me know what you find out from those two questions and we can take the next step from there.
Thanks