Unhappy [Q] "Unable to connect to the proxy server" after updrade to Android 4.3

My Samsung S4 has been experiencing the problem of "Unable to connect to the proxy server" after updrade to Android 4.3, all the apps need network (HTTP) are not working, no matter
using 4G or Wifi connection. For apps which does not require HTTP connection such as Whatsapp or Google Search which is ok.

I have double checked the Proxy setting in my Wifi Setting, which is set to none, so are there anything I have missed or misconfigured?