I am using pygame to make an easy game and just want to import tkinter for pop-up window.
Here’s my code:

import tkinter as tk
from tkinter import messagebox 

def message_box(subject, content):
    root = tk.Tk()
    root.withdraw()
    messagebox.showinfo(subject, content)

And in the game loop:

  if event.type == pygame.KEYDOWN:
      if event.key == pygame.K_n:
          message_box('Stone', 'Return')

When I run the game, it shows:

By the way, I am using pycharm.
If I delete the lines mentioned tk, it works properly.
I’ve tried to solved this problem with ActivateTcl:

Well, I downloaded but nothing happened. How can I fix this? Should I uninstall ActivateTcl?