Week 1 Assignment 1 compiling the model

[gent.spah]

Week 1 Assignment 1 Define output layers of the model

It says use default for wine quality i.e. no activation at all, and sigmoid for wine type output. Note there are 2 output branches in this neural network.

I already replied to your question in another post. I checked the code and the problem is as I said that you are using an activation for wine_quality output. You are not supposed to use activation for that output.