Fail to enable CORS for API Gateway functions

Create a new model from the left menu that you will call Empty and it works

Firstly please select your root resource and select "Enable CORS". It will enable CORS to all methods. Ideally it should work. If in case it doesn't work Please add an empty json in the response as I have marked in the screenshot attached. I believe you don't have any default response header added in your OPTIONS method response (in Method Response ). Please refer screenshot