[email protected]:~# ifconfig wlan0 down
[email protected]:~# airmon-ng check kill
Killing these processes:
[email protected]:~# iwconfig wlan0 mode monitor
Error for wireless request “Set Mode” (8B06) :
SET failed on device wlan0 ; Operation not permitted.
[email protected]:~# ifconfig wlan0 up
SIOCSIFFLAGS: Operation not possible due to RF-kill
I ended up installing a fresh install of kali instead of the custom one from Zaid, everything works good.