Crontab renew fails

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3

From the logs I get:

2016-10-03 01:30:02,398:WARNING:certbot.renewal:Attempting to renew cert from /etc/letsencrypt/renewal/arcath.net.conf produced an unexpected error: The apache plugin is not working; there may be problems with your existing configuration.
The error was: NoInstallationError(). Skipping.
2016-10-03 01:30:02,398: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 346, in renew_all_lineages
    main.obtain_cert(lineage_config, plugins, renewal_candidate)
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/main.py", line 546, in obtain_cert
    installer, auth = plug_sel.choose_configurator_plugins(config, plugins, "certonly")
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/plugins/selection.py", line 196, in choose_configurator_plugins
    diagnose_configurator_problem("authenticator", req_auth, plugins)
  File "/root/.local/share/letsencrypt/local/lib/python2.7/site-packages/certbot/plugins/selection.py", line 273, in diagnose_configurator_problem
    raise errors.PluginSelectionError(msg)
PluginSelectionError: The apache plugin is not working; there may be problems with your existing configuration.
The error was: NoInstallationError()