I have application written on Flutter (Dart) and I have integrated FFI library. I need to call a method from that library on a separate Isolate but it gives me a following error:

Unhandled Exception: Invalid argument(s): Illegal argument in isolate message: (object is a DynamicLibrary)

Here is my code:

class Hub {
  static final Hub _singleton = Hub._internal();

  late hub lib;
  late Pointer<hub_state_s> state;

  factory Hub() {
    return _singleton;
  }

  Hub._internal();
}

  start() async {
    Hub hub = Hub();
    var initResult = await hub.init();
    if (initResult == 0) {
      await Isolate.run(() {
        print("running isolate");
        hub.lib.hub_start(hub.state);
      });
    }
  }