Warning: Use of undefined constant ABSPATH - assumed 'ABSPATH' (this will throw an Error in a future version of PHP) in /nav-menu-template.php on line 11

Warning: Use of undefined constant WPINC - assumed 'WPINC' (this will throw an Error in a future version of PHP) in /nav-menu-template.php on line 11

Warning: require_once(ABSPATHWPINC/class-walker-nav-menu.php): failed to open stream: No such file or directory in /nav-menu-template.php on line 11

Fatal error: require_once(): Failed opening required 'ABSPATHWPINC/class-walker-nav-menu.php' (include_path='.:/:/usr/local/php74/lib/pear') in /nav-menu-template.php on line 11