Issue with Grading C2_W4 assignment

I have been able to successful compile the model for C2_W4 for multiclass classification assignment but I am getting following message in show grade out put :

these are snapshots from assignment :

Passing the tests in the notebook does not prove your code is perfect.

The grader uses different tests, with different sets of data, with different sizes, and doesn’t provide any of the global variables that are present in the notebook’s examples.

I attached the snapshot of complied results , Message in "grader output is not replicable "

Also grader output message should specify the part of code which generated " grader output message " otherwise there is no use of section “show grader output”

The grader doesn’t gracefully handle the situation where your code makes it crash.