Hello,
Sorry for the problem with getting Customize to work on your BoldGrid site. I’m not sure what’s causing the problem. Before you try anything, make sure to clear your browser cache and then try accessing the page. I would recommend that you re-load the BoldGrid plugins (make they are up-to-date). Also, double-check the PHP version that you are using on your server. If you are using cPanel, it is possible that you have a way to change the PHP version built into cPanel. Make sure you’re using version 5.6 or higher. You can also use the guide for Displaying and Loggin PHP errors, Warnings, and Notices. This will help to determine what’s causing the problem. Additionally, check the article on PHP Troubleshooting for BoldGrid to help determine the version you’re using. You may need to speak with your host’s technical support for further information about changing your PHP version.