In my opinion, there should be option for accepting self-signed certificates - probably, plenty of us are using ZM for privacy reasons on self-hosted private small servers (without domain name, only IP). There is no simple way to get for free global trusted certificate for IP address....
Please look also at this thread:
https://forums.zoneminder.com/viewtopic.php?t=32840
In my opinion, there should be option for accepting self-signed certificates - probably, plenty of us are using ZM for privacy reasons on self-hosted private small servers (without domain name, only IP). There is no simple way to get for free global trusted certificate for IP address.... Please look also at this thread: https://forums.zoneminder.com/viewtopic.php?t=32840