Gfilui

I use Ubuntu 16.02. When i try sudo service apache2 restart, it says:

Job for apache2.service failed because the control process exited with error code. See "systemctl status apache2.service" and "journalctl -xe" for details.

Then I type: journalctl -xe, and request:

abr 02 03:14:05 server systemd[1]: Started CUPS Scheduler. 
-- Subject: Unit cups.path has finished start-up 
-- Defined-By: systemd 
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel 
-- 
-- Unit cups.path has finished starting up. 
-- 
-- The start-up result is done. 
abr 02 03:14:05 server systemd[1]: Started CUPS Scheduler. 
-- Subject: Unit cups.service has finished start-up 
-- Defined-By: systemd 
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel 
-- 
-- Unit cups.service has finished starting up. 
-- 
-- The start-up result is done. 
abr 02 03:14:09 server anacron[1047]: Job `cron.daily' terminated 
abr 02 03:14:09 server anacron[1047]: Normal exit (1 job run) 
abr 02 03:14:10 server ddclient[2286]: WARNING: file /var/cache/ddclient/ddclient.cache, line 3: Invalid Value for keyword 'ip' = '' 
abr 02 03:14:10 server ddclient[2290]: WARNING: skipping update of ubuntugdc.sytes.net from <nothing> to 192.168.1.59. 
abr 02 03:14:10 server ddclient[2290]: WARNING: last updated <never> but last attempt on Mon Apr 2 03:09:10 2018 failed. 
abr 02 03:14:10 server ddclient[2290]: WARNING: Wait at least 5 minutes between update attempts. 
abr 02 03:15:01 server CRON[2293]: pam_unix(cron:session): session opened for user root by (uid=0) 
abr 02 03:15:01 server CRON[2294]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1) 
abr 02 03:15:01 server CRON[2293]: pam_unix(cron:session): session closed for user root 
abr 02 03:17:01 server CRON[2306]: pam_unix(cron:session): session opened for user root by (uid=0) 
abr 02 03:17:01 server CRON[2307]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) 
abr 02 03:17:01 server CRON[2306]: pam_unix(cron:session): session closed for user root 
abr 02 03:20:01 server CRON[2325]: pam_unix(cron:session): session opened for user smmsp by (uid=0) 
abr 02 03:20:01 server CRON[2326]: (smmsp) CMD (test -x /etc/init.d/sendmail && test -x /usr/share/sendmail/sendmail && test -x /usr/lib/sm.bin/sendm
abr 02 03:20:01 server sm-msp-queue[2345]: My unqualified host name (server) unknown; sleeping for retry 
abr 02 03:21:01 server sm-msp-queue[2345]: unable to qualify my own domain name (server) -- using short name 
abr 02 03:21:01 server CRON[2325]: pam_unix(cron:session): session closed for user smmsp 
abr 02 03:23:55 server systemd[1]: Starting Cleanup of Temporary Directories... 
-- Subject: Unit systemd-tmpfiles-clean.service has begun start-up 
-- Defined-By: systemd 
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel 
-- 
-- Unit systemd-tmpfiles-clean.service has begun starting up. 
abr 02 03:23:55 server systemd-tmpfiles[2364]: [/usr/lib/tmpfiles.d/var.conf:14] Duplicate line for path "/var/log", ignoring. 
abr 02 03:23:55 server systemd[1]: Started Cleanup of Temporary Directories. 
-- Subject: Unit systemd-tmpfiles-clean.service has finished start-up 
-- Defined-By: systemd 
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel 
-- 
-- Unit systemd-tmpfiles-clean.service has finished starting up. 
-- 
-- The start-up result is done. 
abr 02 03:24:11 server ddclient[2370]: WARNING: file /var/cache/ddclient/ddclient.cache, line 3: Invalid Value for keyword 'ip' = '' 
abr 02 03:25:01 server CRON[2375]: pam_unix(cron:session): session opened for user root by (uid=0) 
abr 02 03:25:01 server CRON[2376]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1) 
abr 02 03:25:01 server CRON[2375]: pam_unix(cron:session): session closed for user root 
abr 02 03:29:11 server ddclient[2396]: WARNING: file /var/cache/ddclient/ddclient.cache, line 3: Invalid Value for keyword 'ip' = '' 
abr 02 03:29:11 server ddclient[2400]: WARNING: skipping update of ubuntugdc.sytes.net from <nothing> to 192.168.1.59. 
abr 02 03:29:11 server ddclient[2400]: WARNING: last updated <never> but last attempt on Mon Apr 2 03:24:11 2018 failed. 
abr 02 03:29:11 server ddclient[2400]: WARNING: Wait at least 5 minutes between update attempts. 
abr 02 03:35:01 server CRON[2429]: pam_unix(cron:session): session opened for user root by (uid=0) 
abr 02 03:35:01 server CRON[2430]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1) 
abr 02 03:35:01 server CRON[2429]: pam_unix(cron:session): session closed for user root

And when systemctl status apache2.service Its reaqest:

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 lun 2018-04-02 03:12:34 CEST; 22min ago
 Docs: man:systemd-sysv-generator(8)
 Process: 2045 ExecStart=/etc/init.d/apache2 start (code=exited, status=1/FAILURE)

abr 02 03:12:34 server apache2[2045]: *
abr 02 03:12:34 server apache2[2045]: * The apache2 configtest failed.
abr 02 03:12:34 server apache2[2045]: Output of config test was:
abr 02 03:12:34 server apache2[2045]: apache2: Syntax error on line 219 of /etc/apache2/apache2.conf: Syntax error on line 50 of /etc/apache2/sites-e
abr 02 03:12:34 server apache2[2045]: Action 'configtest' failed.
abr 02 03:12:34 server apache2[2045]: The Apache error log may have more information.
abr 02 03:12:34 server systemd[1]: apache2.service: Control process exited, code=exited status=1
abr 02 03:12:34 server systemd[1]: Failed to start LSB: Apache2 web server.
abr 02 03:12:34 server systemd[1]: apache2.service: Unit entered failed state.
abr 02 03:12:34 server systemd[1]: apache2.service: Failed with result 'exit-code'.

What is wrong? Where is an interrupt? Please help!