Was removing a subdomain cert that I don’t need anymore, accidentally deleted the whole renewal folder. Now I can’t renew:
sudo certbot renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log
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No renewals were attempted.
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I ran this command (by accident while meaning to remove a folder inside renewal): rm -rf /etc/letsencrypt/renewal
It produced this output: 
My web server is (include version): nginx/1.14.0 (Ubuntu)
The operating system my web server runs on is (include version): Ubuntu 18.04.2 LTS
My hosting provider, if applicable, is: digital ocean
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): no
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot): 0.27.0