Warnings appear when trying to use the color customizer

When I click on the color customizer, it loads with the following warnings at the top:

Warning: Creating default object from empty value in /home/dumc/public_html/new/wp-content/themes/HighendWP/admin/theme-customizer.php on line 15

Warning: Creating default object from empty value in /home/dumc/public_html/new/wp-content/themes/HighendWP/admin/theme-customizer.php on line 16

Warning: Creating default object from empty value in /home/dumc/public_html/new/wp-content/themes/HighendWP/admin/theme-customizer.php on line 17

Warning: Creating default object from empty value in /home/dumc/public_html/new/wp-content/themes/HighendWP/admin/theme-customizer.php on line 18

And the Top Bar appears huge.

I added the following to the wp-config.php, which had no effect:

ini_set('display_errors', '0');
error_reporting(0);
define( 'WP_DEBUG', false );