MSQL ошибка помогите пжлст

Warning: mysqli_fetch_assoc() expects parameter 1 to be mysqli_result, array given in /home/**/d/***/domains/*****/engine/classes/mysqli.class.php on line 101

function GetListPeopls(){
    $ListP = new db;
    $rowlist = $ListP->query('SELECT * FROM '.USERPREFIX.'_peopls');
    while ($rowlist = $ListP->get_row($rowlist))
    {
        $p.= "peoplle";
        
    }
    $ListTour->free();
    $Peopls = $p;
    return $Peopls;
}