Python tkinter askopenfilename() not opening and responding

Python tkinter askopenfilename() is not opening and responding. I searched and tried everything but it didn't work.

What's wrong?

Code:

from tkinter.filedialog import askopenfilenames
import pygame, keyboard, time
import tkinter as tk
from tkinter.filedialog import askopenfilename

from pygame import key
pygame.init()
pygame.mixer.init()
SCREEN_WIDTH = 600
SCREEN_HEIGHT = 450
BLACK = (0, 0, 0)
pyscreen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT), pygame.RESIZABLE)
def play(): 
    tkscreen = tk.Tk()
    tkscreen.iconbitmap("void.ico")
    tkscreen.title("Select music file...")
    print("b")
    global music
    tkscreen.update()
    music = askopenfilename() # Not responding!!
    tkscreen.update()
    print("c")
    try:
        pygame.mixer.music.load(music)
        print("d")
        pygame.mixer.music.play()
        print("e")
    except:
        print("e-1")
        print(f"{music} is not a music file. ")
print("a")
play()
pausecooldown = True
paused = False
while True:
    if keyboard.is_pressed("f9"):
        if keyboard.is_pressed("space") and pausecooldown:
            if paused:
                pygame.mixer.music.unpause()
                paused = False
                time.sleep(0.1)
                pausecooldown = False
            elif not paused:
                pygame.mixer.music.pause()
                paused = True
                time.sleep(0.1)
                pausecooldown = False
        pausecooldown = True
    events = pygame.event.get()
    for event in events:
        if event.type == pygame.QUIT:
            exit()

Version: Python 3.9.1

OS: Windows 10 Home

It prints 'b', and opens tkinter and pygame window, but 'Select file' window is not opening, and tkinter and pygame window is not responding.