certbot notes

Issue: Unable to recover files from /var/lib/letsencrypt/temp_checkpoint

# certbot 1.7.0, CentOS 7
certbot --nginx -d site.domain.com
# echo
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Unable to recover files from /var/lib/letsencrypt/temp_checkpoint
Incomplete or failed recovery for /var/lib/letsencrypt/temp_checkpoint
Unable to revert temporary config

I did. Solved:

yum update
mv /var/lib/letsencrypt /var/lib/letsencrypt.original