As shown above the image isn’t loaded. Looking around I saw:
There is no folder called images. Moreover, there is no such folder auto-copied to Google Drive either, so either something is missing in the setup script or there are some “data procuring” rules I haven’t read. I’m not sure if there is any data being added on the colab machine.
Note: This issue has been raised before, sometimes articulately, sometimes not, but has not been resolved in whatever I searched through the forums
I have looked at your notebook, and it appears that you will need to copy the images directory in the notebook repository to your content drive in Colab.