I have an apache2 web server for testing only (not a production server). It is running on Ubuntu 18.04. I have configured it with TLS. I want to add a header. So I navigated to this file:
/etc/apache2/sites-available/default-ssl.conf

The file content now is:

<IfModule mod_ssl.c>
    <VirtualHost _default_:443>
        ServerAdmin hi@myownsite.com
        ServerName myownsite.com

        DocumentRoot /var/www/myownsite.com/html


        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        #   SSL Engine Switch:
        SSLEngine on

        <FilesMatch "\.(cgi|shtml|phtml|php)$">
                SSLOptions +StdEnvVars
        </FilesMatch>
        <Directory /usr/lib/cgi-bin>
                SSLOptions +StdEnvVars
        </Directory>


        Header always set Expect-CT: max-age=86400, enforce, report-uri="https://myownserver.com/report"
    </VirtualHost>
</IfModule>

As you can see, at the end I added the header which I want to see in the server's response when the client open the site in https://

However, after I add the header in the .conf file, and want to reload apache to make the change effective, using:

sudo systemctl reload apache2

I get this error:

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

Can anyone identify what is wrong in my configurations? How to fix the issue?

EDIT 1:

After executing: systemctl status apache2.service

This is what I get, but I do not know what should I do.

● apache2.service - The Apache HTTP Server
   Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
  Drop-In: /lib/systemd/system/apache2.service.d
           └─apache2-systemd.conf
   Active: active (running) (Result: exit-code) since Mon 2019-08-19 12:26:44 BST; 47min ago
  Process: 2632 ExecReload=/usr/sbin/apachectl graceful (code=exited, status=1/FAILURE)
  Process: 660 ExecStart=/usr/sbin/apachectl start (code=exited, status=0/SUCCESS)
 Main PID: 757 (apache2)
    Tasks: 55 (limit: 3548)
   CGroup: /system.slice/apache2.service
           ├─ 757 /usr/sbin/apache2 -k start
           ├─2369 /usr/sbin/apache2 -k start
           └─2370 /usr/sbin/apache2 -k start

Aug 19 12:59:04 e-VirtualBox apachectl[2502]: The Apache error log may have more information.
Aug 19 12:59:04 e-VirtualBox systemd[1]: apache2.service: Control process exited, code=exited stat
Aug 19 12:59:04 e-VirtualBox systemd[1]: Reload failed for The Apache HTTP Server.
Aug 19 13:08:16 e-VirtualBox systemd[1]: Reloading The Apache HTTP Server.
Aug 19 13:08:16 e-VirtualBox apachectl[2632]: AH00526: Syntax error on line 132 of /etc/apache2/si
Aug 19 13:08:16 e-VirtualBox apachectl[2632]: Too many arguments to directive
Aug 19 13:08:16 e-VirtualBox apachectl[2632]: Action 'graceful' failed.
Aug 19 13:08:16 e-VirtualBox apachectl[2632]: The Apache error log may have more information.
Aug 19 13:08:16 e-VirtualBox systemd[1]: apache2.service: Control process exited, code=exited stat
Aug 19 13:08:16 e-VirtualBox systemd[1]: Reload failed for The Apache HTTP Server.
lines 1-24/24 (END)

EDIT 2:

By executing journalctl -xe I get this output:

-- 
-- Unit apache2.service has finished reloading its configuration
-- 
-- The result is RESULT.
Aug 19 13:19:54 e-VirtualBox sudo[2933]: pam_unix(sudo:session): session closed for user root
Aug 19 13:20:46 e-VirtualBox nautilus[2130]: Attempting to read the recently used resources file a
Aug 19 13:20:50 e-VirtualBox sudo[2960]:        e : TTY=pts/1 ; PWD=/etc/apache2/sites-available ;
Aug 19 13:20:50 e-VirtualBox sudo[2960]: pam_unix(sudo:session): session opened for user root by (
Aug 19 13:20:50 e-VirtualBox systemd[1]: Reloading The Apache HTTP Server.
-- Subject: Unit apache2.service has begun reloading its configuration
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
-- 
-- Unit apache2.service has begun reloading its configuration
Aug 19 13:20:50 e-VirtualBox apachectl[2963]: AH00526: Syntax error on line 132 of /etc/apache2/si
Aug 19 13:20:50 e-VirtualBox apachectl[2963]: Too many arguments to directive
Aug 19 13:20:50 e-VirtualBox apachectl[2963]: Action 'graceful' failed.
Aug 19 13:20:50 e-VirtualBox apachectl[2963]: The Apache error log may have more information.
Aug 19 13:20:50 e-VirtualBox systemd[1]: apache2.service: Control process exited, code=exited stat
Aug 19 13:20:50 e-VirtualBox systemd[1]: Reload failed for The Apache HTTP Server.
-- Subject: Unit apache2.service has finished reloading its configuration
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
-- 
-- Unit apache2.service has finished reloading its configuration
-- 
-- The result is RESULT.
Aug 19 13:20:50 e-VirtualBox sudo[2960]: pam_unix(sudo:session): session closed for user root
lines 1835-1862/1862 (END)