3rd person joined video and audio getting muted

[RajashekarAdukaniBlueCloud]

Issue : - When 3rd person joined muted audio and video.

I followed the below steps to resolve.

Ubuntu 18.04
4vCPUs, 15GB memory
Allow HTTP traffic
Allow HTTPS traffic

sudo apt update
sudo apt install apt-transport-https
sudo apt update
sudo apt-add-repository universe
uname -a
sudo hostnamectl set-hostname meet.example.org
hostname
sudo nano /etc/hosts
127.0.0.1 localhost meet.example.org

curl https://download.jitsi.org/jitsi-key.gpg.key | sudo sh -c 'gpg --dearmor > /usr/share/keyrings/jitsi-keyring.gpg'

echo 'deb [signed-by=/usr/share/keyrings/jitsi-keyring.gpg] https://download.jitsi.org stable/' | sudo tee /etc/apt/sources.list.d/jitsi-stable.list > /dev/null

sudo nano /etc/hosts
sudo apt install ufw
sudo ufw allow 80/tcp
sudo ufw allow 4443/tcp
sudo ufw allow 10000/udp
sudo ufw allow 10000:20000/udp
sudo ufw allow 22/tcp
sudo ufw enable
sudo ufw status verbose
sudo ufw allow ssh
sudo ufw allow http
sudo ufw allow https
sudo apt update
sudo apt install nginx

sudo ufw app list
systemctl status nginx
sudo apt install jitsi-meet

ip a
ip addre show
sudo nano /etc/jitsi/videobridge/sip-communicator.properties

org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS=localIP (Google VPS Internal IP)
org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS=publicIP

sudo nano /etc/systemd/system.conf
DefaultLimitNOFILE=65000
DefaultLimitNPROC=65000
DefaultTasksMax=65000

systemctl show --property DefaultLimitNPROC
systemctl show --property DefaultLimitNOFILE
systemctl show --property DefaultTasksMax

sudo systemctl daemon-reload
sudo systemctl status jitsi-videobridge2
sudo apt-get install wget
sudo /usr/share/jitsi-meet/scripts/install-letsencrypt-cert.sh

sudo systemctl daemon-reload
sudo systemctl restart prosody.service
sudo systemctl restart jicofo.service
sudo systemctl restart jitsi-videobridge2.service
sudo systemctl restart nginx

Please help me on this, did i followed the process anything i did wrong? In my console log there are no errors