so im following this tutorial and the game works just fine but when i close the window, it returns an error. it doesnt break the code, it just happens and i dont understand what the error is.

game.py:

from turtle import Screen, Turtle
from paddle import Paddle
from ball import Ball
from scoreboard import Scoreboard
import time

screen = Screen()

screen.setup(width=800, height=600)
screen.bgcolor("black")
screen.title("Pong")
screen.tracer(0)

r_paddle = Paddle((350, 0))
l_paddle = Paddle((-350, 0))
ball = Ball()
scoreboard = Scoreboard()

screen.listen()
screen.onkeypress(fun=r_paddle.up, key="Up")
screen.onkeypress(fun=r_paddle.down, key="Down")
screen.onkeypress(fun=l_paddle.up, key="w")
screen.onkeypress(fun=l_paddle.down, key="s")

run = True
while run:
    time.sleep(ball.move_speed)
    ball.move()
    screen.update()
    if ball.ycor() > 290 or ball.ycor() < -290:
        ball.bounce_wall()

    if ball.distance(r_paddle) < 55 and ball.xcor() > 320 and ball.x_move > 0:
        ball.bounce_paddle()

    if ball.distance(l_paddle) < 55 and ball.xcor() < -330 and ball.x_move < 0:
        ball.bounce_paddle()

    if ball.xcor() > 380:
        ball.home()
        ball.move_speed = 0.04
        scoreboard.l_score += 1
        ball.x_move *= -1
        scoreboard.update()

    if ball.xcor() < -380:
        ball.home()
        ball.move_speed = 0.04
        scoreboard.r_score += 1
        ball.x_move *= -1
        scoreboard.update()


screen.exitonclick()

ball.py:

from turtle import Turtle


class Ball(Turtle):
    def __init__(self):
        super().__init__()
        self.shape("circle")
        self.penup()
        self.color("white")
        self.shapesize(stretch_wid=1.2)
        self.x_move = 10
        self.y_move = 10
        self.move_speed = .04

    def move(self):
        new_x = self.xcor() + self.x_move
        new_y = self.ycor() + self.y_move
        self.goto(new_x, new_y)

    def bounce_wall(self):
        self.y_move *= -1

    def bounce_paddle(self):
        self.x_move *= -1
        self.move_speed *= .9

paddle.py:

from turtle import Turtle, Screen

screen = Screen()


class Paddle(Turtle):
    def __init__(self, cor):
        super().__init__()
        self.shape("square")
        self.color("white")
        self.penup()
        self.speed("fastest")
        self.shapesize(stretch_wid=5, stretch_len=1)
        self.goto(cor)


    def up(self):
        new_y = self.ycor() + 20
        self.goto(x=self.xcor(), y=new_y)


    def down(self):
        new_y = self.ycor() - 20
        self.goto(x=self.xcor(), y=new_y)

scoreboard.py:

from turtle import Turtle

class Scoreboard(Turtle):
    def __init__(self):
        super().__init__()
        self.color("white")
        self.penup()
        self.hideturtle()
        self.r_score = 0
        self.l_score = 0
        self.update()


    def update(self):
        self.clear()
        self.goto(-100, 150)
        self.write(self.l_score, align="center", font=("Courier", 80, "bold"))
        self.goto(100, 150)
        self.write(self.r_score, align="center", font=("Courier", 80, "bold"))

this error did not occur before i made some edits to the code so i tried changing whatever didnt matter to the original code but it didnt work.