Webmin provides a graphical user interface (GUI) for tasks such as user account management, package management, file system configuration, network configuration, and more.
To Install Webmin System Administration, 
run the command below in the LXC console.
bash -c "$(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/tools/addon/webmin.sh)"
Webmin Interface: (https)IP:10000
Initial Login
username root
password root
To Update Webmin
Update from the Webmin UI
To Uninstall Webmin
bash /etc/webmin/uninstall.sh