I’m trying to learn how to do SSL Pinning in Flutter with my movie catalog app I’ve made using https://api.themoviedb.org/3/. I think the certificate that I used is correct and I don’t what is causing this error :

Exception has occurred.
HandshakeException (HandshakeException: Handshake error in client (OS Error: 
    CERTIFICATE_VERIFY_FAILED: unable to get local issuer certificate(handshake.cc:393)))

I’ve tried using google and cloudflare dns but the result is still the same.

My Code :

static const BASE_URL = 'https://api.themoviedb.org/3';

  Future<SecurityContext> get globalContext async {
    try {
      final sslCert = await rootBundle.load('certificates/certificates.pem');
      print('Certificate loaded successfully.');
      SecurityContext securityContext =
          SecurityContext(withTrustedRoots: false);
      securityContext.setTrustedCertificatesBytes(sslCert.buffer.asInt8List());
      return securityContext;
    } catch (e) {
      print('Error loading certificate: $e');
      rethrow;
    }
  }

  @override
  Future<List<MovieModel>> getNowPlayingMovies() async {
    HttpClient client = HttpClient(context: await globalContext);
    client.badCertificateCallback =
        (X509Certificate cert, String host, int port) => false;
    IOClient ioClient = IOClient(client);
    final response =
        await ioClient.get(Uri.parse('$BASE_URL/movie/now_playing?$API_KEY'));

    if (response.statusCode == 200) {
      return MovieResponse.fromJson(json.decode(response.body)).movieList;
    } else {
      throw ServerException();
    }
  }