Warning: require_once(ABSPATHwp-admin/includes/class-walker-nav-menu-edit.php): failed to open stream: No such file or directory in /home/mmdcit/public_html/wp-admin/includes/nav-menu.php on line 11

Fatal error: require_once(): Failed opening required 'ABSPATHwp-admin/includes/class-walker-nav-menu-edit.php' (include_path='.:/opt/php56/lib/php') in /home/mmdcit/public_html/wp-admin/includes/nav-menu.php on line 11