Sorry for the multiple replies but I actually did confirm this bug!
I’ve reported it to our developers and expect a fix to be released sometime soon.
If you’d like to fix it yourself right away, please add an exclamation point between || and in_array at Line 1153 of /wp-content/plugins/the-events-calendar-eventbrite-tickets/src/Tribe/API.php
Of course, we always recommend restorable database and file backups before modifying anything on your site.
I’ll mark this ticket as Pending Fix, which means this thread should receive a reply once the applicable fix has been released. I cannot guarantee when it will be fixed as it’s in the development team’s hands now. They need to assign it, code it, test it, and schedule it for release.
I apologize for this issue and appreciate your understanding and patience.