Livestreaming youtube Connection timeout

Hi everybody,
I installed Jitsi in Ubuntu 20.04 TLS (8Gb RAM + CPU 4 cores) by docker, version docker-jitsi-meet-stable-5142-4 in a strict environment.
I run jibri as well. I can record but I can live stream. In jibri logs, I got Ffmpep quit abruptly. Last output line: rtmp://a.rtmp.youtube.com/live2/xxxx-xxxx-xxx: connection timed out.
I had added rtmp://a.rtmp.youtube.com to a whitelist. But it still not working. Can anyone help?