Great. Closing ticket.

@ewafford– This is coming in the next version of Piklist!

@vagelis– Only include the Page parameter in the Workflow header file. Remove it from all the others:
Page: post.php, post-new.php, post-edit.php, admin.php

Piklist will be ready before November 12, which is the current release date for PHP 7.

get_post_meta has a third parameter, which you set to true. From the codex page for get_post_meta:
Whether to return a single value.

However, in your code you are looking for an array key, not a single value: $ticket_links[0], so you should set that parameter to false:
$ticket_links = get_post_meta($post->ID, 'ticket_links', false);

The best way to debug this in the future is to look at your data. PHP has a function, print_r, that helps you do this. However, print_r doesn’t always display values in the easiest to read format, so Piklist has a function to help: piklist::pre(). You can use either.

So, to debug in the future do something like this:

$ticket_links = get_post_meta($post->ID, 'ticket_links', true);
piklist::pre($ticket_links);

You will see that there is no [0] key for you to check.

Now, change the third parameter to false:

$ticket_links = get_post_meta($post->ID, 'ticket_links', false);
piklist::pre($ticket_links);

WordPress now added that key for you.

Hope that helps, and makes sense.

@vsalda– Why are you trying to override the default WordPress form for users?

@cosmocanuck— What version of Piklist are you using?

@cosmocanuck– Can you post your field code for ticket_links?