Sorry I was still running this patch and it was causing issues now that things are updated 🙂
// Compatibility fix to help run WooCommerce Tickets 3.9 with WooCommerce 2.3.x
if ( class_exists( 'TribeWooTickets' ) ) {
// Form reference to ticket processing callback
$wootickets = TribeWooTickets::get_instance();
$callback = array( $wootickets, 'process_front_end_tickets_form' );
// Switch to a later action
remove_action( 'init', $callback );
add_action( 'wp_loaded', $callback );
}