Issues with kismet using raspberry pi 4 (Raspbian OS 64-bit)

[Anoymus29]

Hi I am currently doing a project which requires me to use Kismet on my Raspberry Pi 4 (RasbianOS).
Currently I use a TP-Link AC600 (RTL8821AU, wlan1) to set up as monitor mode since raspberry pi 4 wifi module (wlan0) is unable to operate in monitor mode. I have attempted 3 different problems when setting up the kismet.

The goal of my project is to gather Wi-Fi Datasets to do some machine learning

Problem 1
when I set-up the monitor mode using
sudo ifconfig wlan1 down
sudo iwconfig wlan1 mode monitor
sudo ifconfig wlan1 up
my kismet will be getting this issue.

Problem 2
when I set-up the monitor mode using
sudo ifconfig wlan1 down
sudo airmon-ng start wlan1
my kismet will be getting this issue: hanged

Problem 3
when I set-up the monitor mode using
sudo airmon-ng check kill
sudo airmon-ng start wlan1
my kismet will be getting this issue: My wlan1 will be able to detect data source but i am unable to access kismet web browser

Your help would be much appreciated!