Hi,
Sorry for the issues you are having with the update to WooCommerce 2.3
Can you try this coding to see if that helps resolve the issue:
// -----------------------------------------------------------------------------
// The code below this comment should be added to the theme's functions.php file
// -----------------------------------------------------------------------------
// 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 );
}
Let me know if that works for you.
Thanks