The first comments state that the Indicator Plugin was either not installed or not added to the panel (comment #2). If you have removed the indicator area knowingly, you should disable the autostart entry for the Indicator Application service (comment #11).
Running "sudo nm-applet" is not recommended (it may alter file permissions, and therefore break some functionality). Try "dbus-launch nm-applet" instead. Now, does the icon appear in the notification area or indicator area of the panel?
The first comments state that the Indicator Plugin was either not installed or not added to the panel (comment #2). If you have removed the indicator area knowingly, you should disable the autostart entry for the Indicator Application service (comment #11).
Running "sudo nm-applet" is not recommended (it may alter file permissions, and therefore break some functionality). Try "dbus-launch nm-applet" instead. Now, does the icon appear in the notification area or indicator area of the panel?