Cats vs Dogs with Data Augmentation

Hello
I have finished my work for the Week assignment and after sending my code I got the following error:

Failed test case: There was an error grading this function. Details shown in ‘got’ value below:.
Expected:
no exceptions,
but got:
[Errno 17] File exists: ‘/tmp/tmpe4jhj7tq’.

Does anyone know why?
Thanks

Please click my name and send your notebook as attachment.