This is probably a problem with Postman as I seem to have the same issue trying to proxy with Charles. I followed instructions http://blog.getpostman.com/2017/09/29/client-proxy-settings-in-postman/ with Postman app open but I am unable to connect to WiFi with proxy settings on. Do you have any ideas on troubleshooting this? I am using default port of 5555 and my macbook pro’s IP. Both laptop and phone are on the same WiFi network. Thanks for any help!