Ok, so it looks like an updated certificate (I use cloudflare for a few sites, these two included, but also some of the ones that were still fine) that I guess Lucee doesn’t update automatically (just guessing based on some past discussions on the topic). I couldn’t get the install via the server admin to work, but Cfhttp error over SSL (unable to find valid certification path to requested target) - #2 by ian_chapman had this neat little piece of code that handily fixed the problem:
<cfscript>
dump(SSLCertificateInstall("rodelokkavel.no"));
</cfscript>
So yeah, that is something a noob like me would never have been able to figure out without the pointing in the right direction by you guys. Thanks for the help!