Can't connect to Wifi connection(Wifi gone in network manager)

busybee

Firstly, you should run
  sudo ifconfig -a
to list all the network inferaces.

Then do a WiFi reset:
   sudo /usr/local/bin/wifi-off.sh
   sleep 3
   sudo /usr/local/bin/wifi-on.sh

Check the network interfaces again:
  sudo ifconfig -a

View kernel log:
   sudo dmesg

Please post the result here.