When I close my tkinter window, I am receiving this error on my command line.

The only other issue with my program is that when I enter text using my “enter_button” – I have to hit enter twice or click the button twice for the text to be displayed. Im not sure if they are related.

These are the widgets that the error is referring to:

#game input frame    
entry_frame = ttk.Frame(root)
entry_frame.grid(row = 2, column = 1, sticky = "ew", padx = (15,5))

entry_frame.columnconfigure(0, weight = 25)
entry_frame.columnconfigure(1, weight = 2)

text_entry = ttk.Entry(entry_frame)
text_entry.grid(row = 0, column = 0, sticky = "nsew")
text_entry.focus()

text_entry.bind("<Return>", add_to_game_out)

enter_button = ttk.Button(entry_frame, text = "Enter", command = add_to_game_out)
enter_button.grid(row = 0, column = 1, sticky = "nsew")

And this is the entirety of my graphics.py file in this program:

import tkinter as tk
from tkinter import ttk

root = tk.Tk()
root.geometry("800x600")
root.title("Start Game")

root.configure(background = "#212121")

root.columnconfigure(0, weight = 2)
root.columnconfigure(1, weight = 5)
root.rowconfigure(0, weight = 5)
root.rowconfigure(1, weight = 5)
root.rowconfigure(2, weight = 2)

#button frame

button_frame = ttk.Frame(root)
button_frame.grid(row = 0, column = 0, sticky = "nsew")

button_frame.columnconfigure(0, weight = 1)
button_frame.rowconfigure(0, weight = 1)
button_frame.rowconfigure(1, weight = 1)
button_frame.rowconfigure(2, weight = 1)
button_frame.rowconfigure(3, weight = 1)
button_frame.rowconfigure(4, weight = 1)

help_button = ttk.Button(button_frame, text = "Help")
help_button.grid(row = 0, column = 0)

inventory_button = ttk.Button(button_frame, text = "Inventory")
inventory_button.grid(row = 1, column = 0)

spells_button = ttk.Button(button_frame, text = "Spells")
spells_button.grid(row = 2, column = 0)

styles_button = ttk.Button(button_frame, text = "Styles")
styles_button.grid(row = 3, column = 0)

#status frame
status_frame = ttk.Frame(root)
status_frame.grid(row = 1, column = 0, rowspan = 2, 
                  sticky = "nsew", padx = 5, pady = (5,15))

label = ttk.Label(status_frame, background = "#373737", 
                  text = "Status box", anchor = "n")
label.pack(expand = True, fill = "both")

#game output frame
text_frame = ttk.Frame(root)
text_frame.grid(row = 0, column = 1, rowspan = 2, sticky = "nsew")

game_text = tk.Text(text_frame, background = "#212121", 
                            wrap = "word"
)                  
game_text.pack(expand = True, fill = 'both')

#output tags
game_text.tag_configure("title", background = "#212121", 
                        font=("Times New Roman", 12, "bold"), 
                        foreground = "#9B61AB")
game_text.tag_configure("user", background = "#212121", 
                        font=("Times New Roman", 11), 
                        foreground = "#D7D7D7")
game_text.tag_configure("output", background = "#212121",
                        font=("Times New Roman", 12, "bold"),
                        foreground = "#759EE0")

#output to text box with optional text arguments
def game_out(text, tags = "user"):
    game_text.configure(state = "normal")
    game_text.insert(tk.END, f"{text}n", tags)
    game_text.configure(state = "disabled")
    game_text.see(tk.END)

#display content and progress game using gamestate()
def add_to_game_out(event=None):
    from main import gamestate, gstate
    if text_entry.get():
        text = text_entry.get()
        text_entry.delete(0, tk.END)
        # print(f"State: {gstate}")
        return gamestate(text)

#title/credits printed upon execution
with open("text_files/narrative.txt") as start:
    start = start.readlines()
    count = 0
    beginning = "***TitleStart***"
    end = "***TitleEnd***"
    section = []
    for line in start:
        if beginning in line:
            section.append(count)
        if end in line:
            section.append(count)
        count += 1
    for line in range(section[0]+1, section[1]):
        game_out(start[line], "title")

#game input frame    
entry_frame = ttk.Frame(root)
entry_frame.grid(row = 2, column = 1, sticky = "ew", padx = (15,5))

entry_frame.columnconfigure(0, weight = 25)
entry_frame.columnconfigure(1, weight = 2)

text_entry = ttk.Entry(entry_frame)
text_entry.grid(row = 0, column = 0, sticky = "nsew")
text_entry.focus()

text_entry.bind("<Return>", add_to_game_out)

enter_button = ttk.Button(entry_frame, text = "Enter", command = add_to_game_out)
enter_button.grid(row = 0, column = 1, sticky = "nsew")

#close window and destroy widgets
def close_window():
    enter_button.destroy()
    text_entry.destroy()
    entry_frame.destroy()
    root.destroy()


root.protocol("WM_DELETE_WINDOW", close_window)

I have tried adding a function to close and destroy widgets because I was reading some other questions and answers where that was the solution, but I am still receiving the error even after implementing:

#close window and destroy widgets
def close_window():
    enter_button.destroy()
    text_entry.destroy()
    entry_frame.destroy()
    root.destroy()


root.protocol("WM_DELETE_WINDOW", close_window)