Issue : The presentation file (pdf) not appear in the web interface
Solution :
1. In root, run this #journalctl -u bbb-html5 | grep error
2. Remove DST_Root_CA_X3 certificate in ca-certificate config
- #vi /etc/ca-certificates.conf
- comment to disable !mozilla/DST_Root_CA_X3.crt
3. Update certificate #update-ca-certificates
4. Edit /usr/share/meteor/bundle/systemd_start.sh
- add the parameter --use-openssl-ca
5. Restart BigBlureButton servics
- #bbb-conf --restart
Source :https://hossamelshahawi.com/2021/10/01/bigbluebutton/