Did you unzip the images? The train_0.jpg is probably absent from your drive because of an upload failure. I faced the same problem where there were around 300-400 failed uploads which caused the same error. What i thought was to delete those details of failed uploads on the csv file but i wasn’t able to do that as I’m a novice. Upon several tries, i gave up and executed the notebook on local machine . This link did help me when i faced this problem Lesson 3 - Can't Download Planet Data Images Tar Archive