Photo Links Broken on Subdomain

Hello everyone,

I’ve been using PHP for over a decade but this is my first time working with WordPress. I’m rather stumped.

My client has an existing WordPress website they’ve asked me to fix. I’ve set up a test version of the site on a subdomain on the same server and have the site up and running now. Unfortunately the photo links in their custom theme are broken on the test site and I have no idea how to troubleshoot. Here’s the code:

Excerpt from page-templates/home.php

<?php
        $photo_links = array();
        if(get_field('photo_links')){

			while(has_sub_field('photo_links'))
            {
                $photo_links[] = array(
                    "title" => get_sub_field("title",""),
                    "image" => get_sub_field("image",""),
                    "page_link" => get_sub_field("page_link","")
                );
            }
        }
    ?>

get_field(‘photo_links’) returns “6” and has_sub_field(‘photo_links’) returns nothing, thus $photo_links is never populated.

Any idea where I’d look to get this working?