Course 4 Week1 grader error

I get error whe submit my assignment
[ValidateApp | INFO] Validating ‘/home/jovyan/work/submitted/courseraLearner/W1A1/Convolution_model_Step_by_Step_v1.ipynb’
[ValidateApp | INFO] Executing notebook with kernel: python3
Tests failed on 3 cell(s)! These tests could be hidden. Please check your submission.

All test passed? but a don’t understand where is error?

Please see this other recent thread. If you failed 3 tests, my guess is that you made all three of the mistakes described there.