Red X in System Tray - Caused By Incoming Connections

This is an issue of networking.

After you creat an incoming connection, the system tray icon always displays a red x when no incoming connections are active. However, you still can access internet without problem.

See bellowing snapshot:

Maybe you get confused why there is a red x in Networking Notification because you test the internet which works fine. It's because no incoming connectiosn are active.

Then you create an out-going connection from another computer to this computer, red X disappears, and normal networking connection icon appeares.

So if anyone see this red x after create an incoming connection, Please ignore it, you still can use internet connections.