Fatal error: Uncaught Error: Class 'WP_Customize_Section' not found in /home/refref/public_html/wp-includes-20250406223650-20250409105509-20250410010338/customize/class-wp-customize-themes-section.php:19 Stack trace: #0 {main} thrown in /home/refref/public_html/wp-includes-20250406223650-20250409105509-20250410010338/customize/class-wp-customize-themes-section.php on line 19