1. If you have ERROR BigBlueButton Endpoint and Secret:
cd /root/greenlight
docker-compose down
docker pull bigbluebutton/greenlight:v2
docker-compose up -d
2. Later. If the presentation does not load (each command is entered separately!):
apt-get install snapd
apt-get remove -y certbot
snap install certbot --classic
certbot renew --force-renewal --preferred-chain "ISRG Root X1"
3. Then, MANDATORY! We enter these commands:
bbb-conf --clean
systemctl restart nginx