AppwriteException (AppwriteException: , ClientException: Connection reset by peer)

import 'dart:async';
import 'dart:io';
import 'package:dart_appwrite/dart_appwrite.dart';
import 'package:starter_template/const.dart';
import 'package:starter_template/models/post.dart';
import 'package:starter_template/post_service.dart';

// This is your Appwrite function
// It's executed each time we get a request
Future<dynamic> main() async {
  // Why not try the Appwrite SDK?
  //
  final client = Client()
      .setEndpoint(Platform.environment['ENDPOINT']!)
      .setProject(Platform.environment['APPWRITE_FUNCTION_PROJECT_ID'])
      .setKey(Platform.environment['APPWRITE_API_KEY']);
  final databases = Databases(client);
  final x = await PostService(database: databases).getAllPosts();
  print(x.length);
  List<Future> futures = [];
  for (var i = 0; i < x.length; i++) {
    final post = x[i];

    final d = databases.updateDocument(
      databaseId: databaseID,
      collectionId: postCOL,
      documentId: post.id!,
      //data: post.toJson(),
      permissions: [
        Permission.delete(Role.user(post.authorId!)),
        Permission.update(Role.user(post.authorId!))
      ],
    );
    futures.add(d);
  }
  await Future.wait(futures);
  exit(0);
}