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: https://portal.kerloresearch.com/
I ran this command:
It produced this output:
My web server is (include version): nginx version: nginx/1.10.3 (Ubuntu)
The operating system my web server runs on is (include version): ubuntu 16.04
My hosting provider, if applicable, is: vultr.com
I can login to a root shell on my machine (yes or no, or I don't know): Yes
I'm using a control panel to manage my site (no, or provide the name and version of the control panel): only access from putty
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):certbot 0.31.0