Hi everyone! There is indeed a problem with the TF version update on Colab. To get around it, please add a code cell up top and run these:
!pip install tensorflow==2.15.0 --quiet
!pip install keras==2.15.0 --quiet
That should work with the GPU available on Colab so you can train fast. You should run all the cells again until you generate a new model file.
Then you will need to downgrade to v2.8 (code is already in the notebook) in the last few cells for grader compatibility. This lower version is not compatible with Colab’s GPU so you will only use it for grading.
We’ll update the notebook and request updates to the grader, but hope this will suffice for now so you can get your grade asap. Thank you and sorry for the inconvenience!