2017-11-20 19:57:50,640:DEBUG:certbot.error_handler:Calling registered functions
2017-11-20 19:57:50,642:DEBUG:certbot.reporter:Reporting to user: Unable to install the certificate
2017-11-20 19:57:50,642:DEBUG:certbot.log:Exiting abnormally:
Traceback (most recent call last):
  File "/opt/eff.org/certbot/venv/bin/letsencrypt", line 11, in <module>
    sys.exit(main())
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/main.py", line 861, in main
    return config.func(config, plugins)
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/main.py", line 705, in run
    _install_cert(config, le_client, domains, new_lineage)
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/main.py", line 565, in _install_cert
    path_provider.cert_path, path_provider.chain_path, path_provider.fullchain_path)
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/client.py", line 452, in deploy_certificate
    fullchain_path=fullchain_path)
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot_apache/configurator.py", line 253, in deploy_cert
    vhost = self.choose_vhost(domain)
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot_apache/configurator.py", line 347, in choose_vhost
    vhost = self.make_vhost_ssl(vhost)
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot_apache/configurator.py", line 852, in make_vhost_ssl
    self._copy_create_ssl_vhost_skeleton(nonssl_vhost, ssl_fp)
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot_apache/configurator.py", line 998, in _copy_create_ssl_vhost_skeleton
    ssl_vh_contents, sift = self._sift_rewrite_rules(orig_contents)
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot_apache/configurator.py", line 1070, in _sift_rewrite_rules
    line = next(contents)
StopIteration