Thanks for using Tracks, sorry for the trouble with the Customizer.
Since I can’t recreate this issue and there aren’t other users having this problem, and since you are only having this problem with Tracks and not other themes, I think the issue is most likely a conflict between Tracks and a plugin on your site.
Could you try temporarily deactivating your plugins, and then visiting the Customizer? You will not lose any of your settings or data by deactivating the plugins.
I just deactivated all my plug-ins and I’m still having the same issue loading the page.
Are you using the newest version of Tracks and WordPress? Tracks should be v1.39 and WordPress v4.3.
Yup, I just checked and both are up to date.
Okay thanks. I will need to login then to check it out. Could you send your admin username and password to me at support@competethemes.com?
UPDATE: the issue was with WordPress’ script concatenation. The solution was to add the following to the bottom of the wp-config.php file:
define('CONCATENATE_SCRIPTS', false);
