I am using the latest version (1.1.9) with the AppsFlyer plugin. It works and we are receiving the events in Segment and Appsflyer. But we are getting a PluginError exception:

I/flutter (15244): ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
I/flutter (15244): │ #0 SystemLogger.parseLog (package:segment_analytics/logger.dart:80:16)
I/flutter (15244): │ #1 log (package:segment_analytics/logger.dart:106:23)
I/flutter (15244): ├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
I/flutter (15244): │ ⛔ Segment: An internal error occurred: Instance of 'PluginError'
I/flutter (15244): └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
I/flutter (15244): ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
I/flutter (15244): │ #0 SystemLogger.parseLog (package:segment_analytics/logger.dart:77:16)
I/flutter (15244): │ #1 log (package:segment_analytics/logger.dart:106:23)
I/flutter (15244): ├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄
I/flutter (15244): │ ⚠️ Segment: Destination AppsFlyer failed to execute: Null check operator used on a null value

This is my initialization code:

    final configuration = Configuration(
    writeKey,
    trackApplicationLifecycleEvents: true,
    collectDeviceId: true,
    debug: kDebugMode,
    defaultIntegrationSettings: {
      'AppsFlyer': {
        'enabled': true,
        'appsFlyerId': appsFlyerId,
      },
    },
    errorHandler: (exception) {
      _logger.error(
        'Analytics initialization error: ${exception.toString()}',
        data: exception,
      );
    },
  );

  final appsFlyerDestination = _getAppsflyerDestination(
    appsFlyerId,
    appsFlyerDevKey,
    appsFlyerIosAppId,
  );

  final segment = createClient(configuration);
  if (appsFlyerDestination != null) {
    segment.addPlugin(appsFlyerDestination);
  }

  await segment.init();
  instance = Analytics();
  instance.analytics = segment;

  setContext(
    {
      "externalIds": [
        {
          "id": appsFlyerId,
          "type": "appsflyerId",
        }
      ],
    },
  );

 static AppsFlyerDestination? _getAppsflyerDestination(
  String? appsflyerId, String appsFlyerDevKey, String? appsFlyerIosAppId) {
try {
  final appsFlyerDestination = AppsFlyerDestination();
  final appleAppId = Platform.isIOS ? appsFlyerIosAppId : null;
  final appsFlyerDestinationSettings = {
    'appleAppID': appleAppId,
    'appsFlyerDevKey': appsFlyerDevKey,
    'httpFallback': false,
    'trackAttributionData': true,
    'type': 'mobile',
    'versionSettings': {
      '': [''],
    },
  };
  appsFlyerDestination.update(
      appsFlyerDestinationSettings, ContextUpdateType.initial);

  return appsFlyerDestination;
} catch (e) {
  AppInitErrorsService().addError(
    Exception('Appsflyer initialization error: ${e.toString()}'),
  );
  return null;
 }
}