Here's another thread with a similar error message, maybe it'll help you find the issue:
If that's the wrong lead, take a look at /var/log/letsencrypt/renewer.log as well (or paste the contents here).
Here's another thread with a similar error message, maybe it'll help you find the issue:
If that's the wrong lead, take a look at /var/log/letsencrypt/renewer.log as well (or paste the contents here).