Object of class CI_DB_mysqli_result could not be converted t

$this->db->query("  UPDATE tb_nilai_normalize
                    SET count = count + 1
                    WHERE term_id = $term[id]
                    AND fotografer_id = $fotografer[fotografer_id]");
$satu_keahlian_fotografer = $this->db->query("  SELECT count
                                                FROM tb_nilai_normalize
                                                WHERE term_id = $term[id]
                                                AND fotografer_id = $fotografer[fotografer_id]"); // seleksi satu baru
// print_r($satu_keahlian_fotografer);
$nilai_normalize = ($satu_keahlian_fotografer->count) / $jumlah_keahlian_foto;
$this->db->query("  UPDATE tb_nilai_normalize
                    SET nilai_normalize = $nilai_normalize
                    WHERE term_id = $term[id]
                    AND fotografer_id = $fotografer[fotografer_id]");