[airdrop-ng on Raspberry Pi 3]

I am using nexmon firmware to latch the internal wifi chipset of Rpi3, and now my rpi3 inbuild wifi chipset supports the monitor mode. Yes i have tested out with iwconfig, it says mode is monitor and interface is wlan0. 

[airdrop-ng on Raspberry Pi 3]

hi i'm recently trying to make the deauth tool using pi 3. but with no luck. I installed/compiled everything like lorcon, libnl-dev, libnl1 and pylorcon. but with no luck. I always get this error.

Unable to get driver
Interface wlan0 does not exist

Airdrop-ng will now exit
Sent 0 Packets

Exiting Program, Please take your card wlan0 out of monitor mode

I wonder, if anyone could help me out in this case.