So Certera is a Certificate Authority spamming folks to insert their links into organic content because they want to appear… *checks notes*… “trustworthy”
To help, I can tell you that you should most likely not be using their services and, by the way, have you checked out Let’s Encrypt? It’s free and automatically updates.
PS. #Kitten automatically handles #TLS certs for you and if you want to do the same in plain Node.js, check out my @small-tech/auto-encrypt module.