Hi @Sanket, while Zoom supports RTMPs, Zoom still also streams out over plain RTMP streams and the docs for livestreaming meetings or webinars on a custom site do not specify/require RTMPS, so SSL should not be mandatory here
That specific Zoom error usually means the meeting client cannot reach your RTMP endpoint or the URL/key are split wrong so you should double check that port 1935 on that host is publicly reachable from the internet rather than only inside your network