Yes, I have. Let's Encrypt ACME challenge resolved this from now on. However, I'm using a really old machine + OS, and the nginx version I'm running is old eno

Yes, I have. Let's Encrypt ACME challenge resolved this from now on. However, I'm using a really old machine + OS, and the nginx version I'm running is old enough not to be compatible with it. So, instead of having a hard time updating the server, I decided to migrate the site to a newer machine (even because some AWS technical limitations don't let me migrate to a new instance type). ~10 years ago I slacked in getting an HTTPS certificate as this would have meant a lot of money. ~ Today, I want to use the ACME challenge with Let's Encrypt (no need of OV for a portfolio website), but I never find the time to finish the migration (that should take more 4 to 16 hours).