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vantage theme, white screen at customize menu

Hello, Thank you for the great work!

Getting a persistent white screen on the appearance customize menu. I have access everywhere else on front and backend.

When I flip on debug mode wordpress gives me this message error:

Fatal error: Class 'WP_Customize_Media_Control' not found in /var/www/html/wordpress/wp-content/themes/vantage/inc/settings/settings.php on line 547

After some basic trouble shooting, I am unclear where the issue lies. That is, whether with the theme itself or with the server settings.

Any assistance is much appreciated.

Some more specifics below :)

cheers,
Andrew

Background Info:
Working on local virtual Apache2 server, MySQL 5.5.54 , PHP 7.0, wordpress 3.8.17
free Vantage theme, downloaded from siteorigin yesterday
Vantage theme installed with recommended plugins (pagebuilder, css, ). No other plugins are installed.
Customize menu works on stock twentyfourteen and twentytwelve themes.

PHP config changes:
changes to the php.ini file, which seem relevant to share.

memory_limit is set to 128M
opcache is disabled (prefer it disable for development purposes)

Order of Troubleshooting I’ve Tried:
disabling all plugins
deleting all plugins
reinstall core wordpress
disable .htaccess
delete .htaccess, reset permalink settings to “post name”, save changes

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  1. 7 years, 8 months ago Alex S
    Hi, I Work Here

    Hi Schreiber,

    Unfortunately, this issue is related to your WordPress version. WP_Customize_Media_Control was introduced in WordPress 4.2.0, while you’re running WordPress 3.8.17. To clarify, the latest version of WordPress is actually 4.7.2.

    I’m fairly certain the most recent version of Vantage that you can use, without updating WordPress, is Vantage 1.4.4, but I really wouldn’t recommend using and instead highly recommend upgrading.

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