Hey,
Thanks for reaching out to us!
To start, have you updated to the new ticketing solution for the Events Calendar? With 4.0 we’ve combined all the ticketing solutions (WooTickets, EDD Tickets, etc.) into a single premium plugin called Tickets Plus. You can find more information on that here.
Does the issue persist after making those updates? I did a quick review and it appears that based on the exact snippet from the other thread, an array should be getting passed to that function based on all the variables there.
Let me know if this helps.
Thanks!