┌──(kali㉿rpi)-[~]
└─$ wash -i wlan0mon
[X] ERROR: pcap_activate status -8
[X] PCAP: no permission to open the device
couldn’t get pcap handle, exiting

You can fix the above error while executing wash by installing the following dependencies.

apt-get install sqlite3 libsqlite3-dev libpcap0.8-dev