Incorrecto value for cost in Logistic_Regression_with_a_Neural_Network_mindset

My guess is that you do not have the latest version of the notebook. There was a version with a bug in it that was fixed maybe 36 hours ago, but perhaps either you haven’t closed and reopened the notebook since the fix or maybe they didn’t make it a “force update”.

There is a topic on the FAQ Thread about how to get a clean copy. Then carefully “copy/paste” over just your solution code to the new version and see if that fixes the issue.