Flutter Hive: Open and return Box in isolate

Question

I'm trying to open the box separately because the box contains so much data that it's causing my main UI to stutter/freeze. Is there a way to open the box separately and return the box object?

I asked ChatGPT and he gave this answer:

Future<Box> openBoxInIsolate(String boxName, String path) async {
  final receivePort = ReceivePort();
  await Isolate.spawn(
    _openBoxInIsolate,
    IsolateArgument(boxName: boxName, path: path, sendPort: receivePort.sendPort),
  );
  return await receivePort.first as Box;
}

void _openBoxInIsolate(IsolateArgument arguments) async {
  final box = await Hive.openBox(arguments.boxName, path: arguments.path);
  arguments.sendPort.send(box);
}

class IsolateArgument {
  final String boxName;
  final String path;
  final SendPort sendPort;

  IsolateArgument({required this.boxName, required this.path, required this.sendPort});
}

But this code gives an error Invalid argument(s): Illegal argument in isolate message: (object extends NativeWrapper - Library:'dart:io' Class: _RandomAccessFileOpsImpl@13069316)

at arguments.sendPort.send(box); line.