trying to use flask and pygame at the same time

Question

Please ignore my english mistakes*

I'm trying to use pygame and flask as if it were a server I want to use pygame to return a message on the site but it's giving an error that I don't understand

from flask import Flask, render_template
import pygame
import sys
from pygame.locals import *
from multiprocessing import Process, Value
pygame.init()

screen_max = ((1152, 648))
screen = pygame.display.set_mode((screen_max), pygame.FULLSCREEN | pygame.SCALED)

app = Flask(__name__)
def Game_loop():
    global screen_max, screen
    while True:
        screen.fill([255, 255, 255])
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()
            if event.type == pygame.MOUSEBUTTONDOWN:
                @app.route('/')
                def homepage():
                    return "holding"
            if event.type == pygame.MOUSEBUTTONUP:
                @app.route('/')
                def homepage():
                    return "loose"
    
if __name__ == '__main__':
    p = Process(target=Game_loop)
    p.start()
    app.run(host='0.0.0.0', port=5000, debug=True)
    p.join()

And it's giving this error when I exit the project:

Traceback (most recent call last):
  File "/storage/emulated/0/Download/server/main.py", line 32, in <module>
  File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.9/site-packages/flask/app.py", line 909, in run
    cli.show_server_banner(self.env, self.debug, self.name, False)
  File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.9/site-packages/flask/cli.py", line 649, in show_server_banner
    click.echo(message)
  File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.9/site-packages/click/utils.py", line 299, in echo
    file.write(out)  # type: ignore
  File "/data/user/0/ru.iiec.pydroid3/files/aarch64-linux-android/lib/python3.9/site-packages/click/_compat.py", line 108, in __getattr__
    return getattr(self._stream, name)
AttributeError: 'str' object has no attribute 'write'

The screen is not even white by the code line screen.fill

I don't know if this is a problem with the multiprocessing module or a conflict with pygame