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Describe the bug

Python version: 3.13.5.
Environment: Spyder 6.0.7

I recently discovered this library and have installed it in a virtual environment. However when I run the example code I get "RuntimeError: asyncio.run() cannot be called from a running event loop" I must warn that I am working in Spyder Environment (winpython)

DJuego

Code sample

import flet as ft

def main(page: ft.Page):
    page.title = "Flet counter example"
    page.vertical_alignment = ft.MainAxisAlignment.CENTER

    txt_number = ft.TextField(value="0", text_align=ft.TextAlign.RIGHT, width=100)

    def minus_click(e):
        txt_number.value = str(int(txt_number.value) - 1)
        page.update()

    def plus_click(e):
        txt_number.value = str(int(txt_number.value) + 1)
        page.update()

    page.add(
        ft.Row(
            [
                ft.IconButton(ft.Icons.REMOVE, on_click=minus_click),
                txt_number,
                ft.IconButton(ft.Icons.ADD, on_click=plus_click),
            ],
            alignment=ft.alignment.center,
        )
    )

ft.app(main)

To reproduce

+Python version: 3.13.5.
+Environment: Spyder 6.0.7
+pip install flet

Run the sample code

Expected behavior

Display the example interface of flet.

Screenshots / Videos

Operating System

Windows 10 x64

Operating system details

Flet version

Version: 0.28.3

Regression

No, it isn't

Suggestions

No response

Logs

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Additional details

No response