Before we talk, I’m not good at English, so I’m using a translator to ask questions. Please excuse me for awkward sentences.

from tkinter import *
from PIL import Image, ImageTk
import os
import random


class ImageWindow:
    def __init__(self, title):
        self.window = Tk()
        self.window.title(title)
        self.image = Image.open('cat6.jpg')
        self.image = ImageTk.PhotoImage(self.image)
        self.label = Label(self.window, image=self.image)
        self.label.pack()

This class is configured to display a label window containing images when called.

self.label = Label(self.window, image=self.image)

However, the following error occurs when the above code is executed.

self.tk.call( _tkinter.TclError: image "pyimage202" doesn't exist

To resolve this error, I also checked the path of the image file and checked that the image was fine, so there was no problem with this. Also, I created a label containing images in another class in a similar way as above, but there was no problem at that time, so I don’t know why.

It’s the first time I’ve ever asked a question like this, so I’m really sorry if there’s any problem.
And I would really appreciate it if you could tell me how to solve it.