Hi Alan! Sorry for the late reply. You might have forgotten to uncomment the first code cell at the top of the notebook. You need to install the tensorflowjs_converter package to make use of the command. Kindly run this first:
I have the same problem:
I completed all the tasks, created the model, converted it to JSON, and uploaded all necessary files to Coucera.
The recommended version of TensorFlow 2.2 is not able to be installed in Colab by the provided code. Maybe here is the reason.
I need help understanding what I did wrong if I followed all the instructions.
The grading system needs to explain the reason.
All I see is: The model in your submission is invalid. Please try again!
Unfortunately I had to cancel my certification. Given that the examples provided seemed to be broken and I was paying a monthly fee in order to get the certification there wasn’t much choice at the time.