The events show now because I had to restore a backup so that the site was operational.
When I installed Events Calendar 3.9 and WooCommerce tickets the /single-event/XXX pages were corrupt (ie. showed some html and then appeared to stop loading page).
Is the old Eventbrite plugin (3.4) NOT backward compatible with Event Calendar 3.9?
It appears that I may need to install the latest Eventbrite plugin but we want to migrate to using our recently purchased Woo Tickets plugin and don’t want to buy a plugin we are not planning on using.