I am currently maintaining an Oracle Cloud Application hosted in a private compute instance and is currently being exposed through a Public Load Balancer (PLB). I have been using Certbot to generate my SSL certificates to be used for my PLB to access it via HTTPS.
Just today, all my applications are now facing a 'Your connection is not private' issue with NET::ERR_CERT_AUTHORITY_INVALID as the error message. Last certificate created was Jan 2, 2025 and was working until last Friday, Jan 3, 2025..
Sounds like something changed Friday then 
More seriously, you'll have to provide at least your public domain name if you want us to look at it. Or, use a SSL test site like this one to view the cert being used: SSL Checker
This sounds like a likely misconfiguration in your PLB. Or possibly your DNS
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Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
My domain is:
I ran this command:
It produced this output:
My web server is (include version):
The operating system my web server runs on is (include version):
My hosting provider, if applicable, is:
I can login to a root shell on my machine (yes or no, or I don't know):
I'm using a control panel to manage my site (no, or provide the name and version of the control panel):
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):
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