please help me, when i use the edit button its just give me a blank page

fungsi/edit/index.php

}
    if(!empty($_GET['pengguna'])){
        if (isset($_POST['id_login'], $_POST['user'], $_POST['pass'], $_POST['id_member'])) {
            $id_login= htmlentities($_POST['id_login']);
            $user= htmlentities($_POST['user']);
            $pass= md5(htmlentities($_POST['pass']));
            $id_member= htmlentities($_POST['id_member']);
        }
        

        $data = [$user, $pass, $id_member, $id_login];

        $sql = 'UPDATE pengguna SET user=?, pass=?, id_member=? WHERE id_login=?';
        $row = $config -> prepare($sql);
        $row -> execute($data);

        $id = htmlentities($id_login);
        echo '<script>window.location="../../index.php?page=pengguna&uid=' .$id .'&success-edit=edit-data"</script>';
    } else {
        echo 'Invalid form submission.';
    }
} else {
    echo 'No user specified.';
}

note : database its from table “pengguna”

it contains field (id_login, user, pass, id_member)

pengguna/edit/index.php

}
    if(!empty($_GET['pengguna'])){
        if (isset($_POST['id_login'], $_POST['user'], $_POST['pass'], $_POST['id_member'])) {
            $id_login= htmlentities($_POST['id_login']);
            $user= htmlentities($_POST['user']);
            $pass= md5(htmlentities($_POST['pass']));
            $id_member= htmlentities($_POST['id_member']);
        }
        

        $data = [$user, $pass, $id_member, $id_login];

        $sql = 'UPDATE pengguna SET user=?, pass=?, id_member=? WHERE id_login=?';
        $row = $config -> prepare($sql);
        $row -> execute($data);

        $id = htmlentities($id_login);
        echo '<script>window.location="../../index.php?page=pengguna&uid=' .$id .'&success-edit=edit-data"</script>';
    } else {
        echo 'Invalid form submission.';
    }
} else {
    echo 'No user specified.';
}

fungsi/view/index.php for show data details in the pop up before update vers

}
                function pengguna(){
                    $sql = "SELECT * FROM pengguna";
                    $row = $this->db->prepare($sql);
                    $row->execute();
                    $hasil = $row->fetchAll();
                    return $hasil;
                }
             
                function pengguna_edit($id){
                    $sql = "SELECT * FROM pengguna WHERE id_login = ?";
                    $row = $this->db-> prepare($sql);
                    $row->execute(array($id));
                    $hasil = $row -> fetch();
                    return $hasil;
                }
        
            }