Unable to use any network related

import asyncio

import httpx
from PySide6 import QtAsyncio
from PySide6.QtWidgets import QApplication, QPushButton, QVBoxLayout, QWidget


class MainWindow(QWidget):
    def __init__(self) -> None:
        super().__init__()
        self.fetchButton = QPushButton("fetch")
        self.fetchButton.clicked.connect(lambda: asyncio.ensure_future(self.fetch()))
        layout = QVBoxLayout()
        layout.addWidget(self.fetchButton)
        self.setLayout(layout)

    async def fetch(self) -> None:
        print("start async call")
        async with httpx.AsyncClient() as client:
            resp = await client.get("https://httpbin.org/delay/2")
            print(resp.text)
        print("end async call")


if __name__ == "__main__":
    app = QApplication()
    main_window = MainWindow()
    main_window.show()
    QtAsyncio.run(handle_sigint=True)