Wifi networks device not ready

You can restart your device as it may solve your problem. Instead, you can also use try restarting your network services:

sudo systemctl restart network-manager

Im unable to access network indicator because "Device not ready" issue, this problem happened after reverting back to NetworkManager from wicd network manager thanks to this method.

Have you tried removing unused package that comes with wicd ? If no, consider removing it by running autoremove command:

sudo apt-get autoremove