I have a fairly standard AWS machine running Bitnami/WordPress stack that was created a few months ago. I used the bncert-tool to "do" the SSL certificate. Even though the tool said it created a cron job to auto renew, it did not. (I received an email 10 days left, thanks for that. Thanks for this awesome tool as well.). I've manually renewed.
Here's a GUID to my support bundle:
978dfb31-d45f-4f0c-5fe1-a2ddb3008d7a