Attention,: require_once(ABSPATHWPINC/class-walker-nav-menu.php): failed to open stream: No such file or directory in /home/sentinel/public_html/wp-includes/nav-menu-template.php en ligne 11

erreur fatale: require_once (): Echec de l'ouverture requise 'ABSPATHWPINC / classe-walker-nav-menu.php' (chemin_include = '.: / usr / lib / php: / usr / local / lib / php') /home/sentinel/public_html/wp-includes/nav-menu-template.php en ligne 11