apache2.service - LSB: Apache2 web server
   Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
  Drop-In: /lib/systemd/system/apache2.service.d
           └─apache2-systemd.conf
   Active: failed (Result: exit-code) since Wed 2017-07-19 14:10:06 CEST; 1min 36s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 20003 ExecStop=/etc/init.d/apache2 stop (code=exited, status=0/SUCCESS)
  Process: 13916 ExecReload=/etc/init.d/apache2 reload (code=exited, status=0/SUCCESS)
  Process: 4019 ExecStart=/etc/init.d/apache2 start (code=exited, status=1/FAILURE)

Jul 19 14:10:06 ubuntu245 apache2[4019]:  * The apache2 configtest failed.
Jul 19 14:10:06 ubuntu245 apache2[4019]: Output of config test was:
Jul 19 14:10:06 ubuntu245 apache2[4019]: [Wed Jul 19 14:10:06.771666 2017] [:crit] [pid 4029:tid 139934414
Jul 19 14:10:06 ubuntu245 apache2[4019]: AH00013: Pre-configuration failed
Jul 19 14:10:06 ubuntu245 apache2[4019]: Action 'configtest' failed.
Jul 19 14:10:06 ubuntu245 apache2[4019]: The Apache error log may have more information.
Jul 19 14:10:06 ubuntu245 systemd[1]: apache2.service: Control process exited, code=exited status=1
Jul 19 14:10:06 ubuntu245 systemd[1]: Failed to start LSB: Apache2 web server.
Jul 19 14:10:06 ubuntu245 systemd[1]: apache2.service: Unit entered failed state.
Jul 19 14:10:06 ubuntu245 systemd[1]: apache2.service: Failed with result 'exit-code'.