I've had my site up and working for a few months now (still need to finish building it properly the template project is still half default lol) but because I setup the Nginx server on a digital ocean droplet myself using both for the first time ever I obviously made some mistakes. It was up and running though just always spouting 'nginx[1755018]: nginx: [warn] conflicting server name "jessiejfoley.dev" on 0.0.0.0:443, ignored' whenever I 'nginx -t' or 'java.security.cert.CertificateException' on this server monitor app I have on my phone
But it was up and ssl seemed to be working so I ignored it

today I learned about https://sslshopper.com/ssl-checker...., which told me my intermediate certificates were not functioning properly, I was bored today and didn't wanna be too productive (else boss expects the progress I've made this week every week) and decided to finally go through and see about getting everything fixed properly starting by reinstalling the certs and double checking my commands.

2 hours later I still can't fix the cert errors so I decide to focus on the conflicting name error. Go through the nginx directory cleaning anything non essential or things I put there while trying to figure out how to get it up originally (learned as I was going lol bad practice I know, but it's just a practice site that'll eventually be a portfolio when I feel like making it properly and investing an adequate amount of time)

as soon as I get rid of jessiejfoley_dev.save.3 inside /etc/nginx/conf.d (my actual site is in sites-enabled) my server monitor app stops reporting the cert error and when I check the ssl checker everything is properly working now.

so the easiest problem to fix was actually the cause of all my problems. I'm and idiot and this shows I still have a LONG way to go to actually knowing what I'm doing at all.