Help me with Attribute error in my Image Viewer

Question

When I run programme I gets an image and when I use forward to see next image the first image disappears but next image dont come.
shows error
if master._last_child_ids is None:
AttributeError: 'PhotoImage' object has no attribute '_last_child_ids'

code: https://code.sololearn.com/c5yQY9E8Atcm/#py

Answer 1

What is the error?

Answer 2

Please show your code here using code playground
https://www.sololearn.com/post/75089/?ref=app

Please put the Error message here.