Hey Nathan,
First of all, thanks for digging into this and finding out that the custom code in our tutorial is the source of your problem here – we’ll update that ASAP!
For now, you should be able to keep using that code just fine if you replace the reference to ‘displayEventBriteTicketForm’ with ‘print_ticket_form’. So, in that custom snippet this line of code:
display_tickets = array( Event_Tickets_PRO::instance(), 'displayEventBriteTicketForm' );
Would now look like this:
$display_tickets = array( Event_Tickets_PRO::instance(), 'print_ticket_form' );
I hope this helps! Let us know if it clears up issues for you 🙂
Thanks,
George