2016-12-23 19:26:02,595:DEBUG:certbot.main:Root logging level set at 20
2016-12-23 19:26:02,595:INFO:certbot.main:Saving debug log to /var/log/letsencrypt/letsencrypt.log
2016-12-23 19:26:02,596:DEBUG:certbot.main:certbot version: 0.9.3
2016-12-23 19:26:02,596:DEBUG:certbot.main:Arguments: []
2016-12-23 19:26:02,596:DEBUG:certbot.main:Discovered plugins: PluginsRegistry(PluginEntryPoint#standalone,PluginEntryPoint#manual,PluginEntryPoint#nginx,PluginEntryPoint#webroot,PluginEntryPoint#apache,PluginEntryPoint#null)
2016-12-23 19:26:02,702:DEBUG:certbot.storage:No matches for target cert.
2016-12-23 19:26:02,703:DEBUG:certbot.storage:No matches for target privkey.
2016-12-23 19:26:02,703:DEBUG:certbot.storage:No matches for target chain.
2016-12-23 19:26:02,703:DEBUG:certbot.storage:No matches for target fullchain.
2016-12-23 19:26:02,703:WARNING:certbot.renewal:Attempting to renew cert from /etc/letsencrypt/renewal/triantos.com.conf produced an unexpected error: max() arg is an empty sequence. Skipping.
2016-12-23 19:26:02,704:DEBUG:certbot.renewal:Traceback was:
Traceback (most recent call last):
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/renewal.py", line 344, in renew_all_lineages
    renewal_candidate.ensure_deployed()
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/storage.py", line 531, in ensure_deployed
    if self.has_pending_deployment():
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/storage.py", line 551, in has_pending_deployment
    return smallest_current < self.latest_common_version()
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/storage.py", line 507, in latest_common_version
    return max(n for n in versions[0] if all(n in v for v in versions[1:]))
ValueError: max() arg is an empty sequence

2016-12-23 19:26:02,704:DEBUG:certbot.main:Exiting abnormally:
Traceback (most recent call last):
  File "/root/.local/share/letsencrypt/bin/letsencrypt", line 11, in <module>
    sys.exit(main())
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/main.py", line 776, in main
    return config.func(config, plugins)
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/main.py", line 592, in renew
    renewal.renew_all_lineages(config)
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/renewal.py", line 365, in renew_all_lineages
    len(renew_failures), len(parse_failures)))
Error: 1 renew failure(s), 0 parse failure(s)