Course1 Week4,test all passed but grade 0/ 100

To close the loop on the public thread here, the problem is that the notebook is a very old version from before the course upgrade in April of 2021. That no longer works with the grader here. Please get a fresh copy of the current version as documented here and go from there. Note that the definitions of the main functions have changed, so you need to be careful when “copy/pasting” from your copy to the fresh copy.