I have the exact same issue here, on console have the following issue:
Error parsing plugins : Hostname/IP doesn't match certificate's altnames: "Host: packages.nodebb.org. is not in the cert's altnames: DNS:[domain].com, DNS:www.[domain].com"
I see the save button in your screenshot, what did you mean exactly?
@psychobunny thans, resolved.
@psychobunny I have the "Save" button but it simply doesn't work when I click it.
@cytrax What version of nodebb are you using? 0.3.1? 0.4.2?
cleared your cache?