Notice: Use of undefined constant ABSPATH - assumed 'ABSPATH' in C:\xampp\htdocs\wp\wp-includes\class-wp-customize-panel.php on line 399

Notice: Use of undefined constant WPINC - assumed 'WPINC' in C:\xampp\htdocs\wp\wp-includes\class-wp-customize-panel.php on line 399

Warning: require_once(ABSPATHWPINC/customize/class-wp-customize-nav-menus-panel.php): failed to open stream: No such file or directory in C:\xampp\htdocs\wp\wp-includes\class-wp-customize-panel.php on line 399

Fatal error: require_once(): Failed opening required 'ABSPATHWPINC/customize/class-wp-customize-nav-menus-panel.php' (include_path='.;C:\xampp\php\PEAR') in C:\xampp\htdocs\wp\wp-includes\class-wp-customize-panel.php on line 399