apache2.service Failed Because the Control Process Exited with Error Code

I am using Ubuntu 15 64-bit:

$ uname -a
Linux {hostname} 4.2.0-16-generic

And I have installed apache2:

$ sudo apt-get install -y apache2

I have a mod_xxx.so, which I have placed into: /usr/lib/apache2/modules/. I set the permissions to 755 (rwx r-x r-x).

I edited the apache2.conf:

$ sudo vi /etc/apache2/apache2.conf
AddHandler xxx-handler .xxx
LoadModule xxx_module modules/mod_xxx.so

I know this works, as I have done this on several other Linux machines before.

When I try to restart Apache, it is failing with this error:

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

After doing, what it says above, systemctl status apache2.service, it shows this:

apache2.service - LSB: Apache2 web server
 Loaded: loaded (/etc/init.d/apache2)
 Active: failed (Result: exit-code) since Wed 2016-03-09 10:32:34 GMT; 9s ago
  Docs: man:systemd-sysv-generator(8)
Process: 3479 ExecStop=/etc/init.d/apache2 stop (code=exited, status=0/SUCCESS)
Process: 3503 ExecStart=/etc/init.d/apache2 start (code=exited, status=1/FAILURE)

Mar 09 10:32:34 Ubuntu14 apache2[3503]: *
Mar 09 10:32:34 Ubuntu14 apache2[3503]: * The apache2 configtest failed.
Mar 09 10:32:34 Ubuntu14 apache2[3503]: Output of config test was:
Mar 09 10:32:34 Ubuntu14 apache2[3503]: apache2: Syntax error on line 224 of...y
Mar 09 10:32:34 Ubuntu14 apache2[3503]: Action 'configtest' failed.
Mar 09 10:32:34 Ubuntu14 apache2[3503]: The Apache error log may have more i....
Mar 09 10:32:34 Ubuntu14 systemd[1]: apache2.service: Control process exite...=1
Mar 09 10:32:34 Ubuntu14 systemd[1]: Failed to start LSB: Apache2 web server.
Mar 09 10:32:34 Ubuntu14 systemd[1]: apache2.service: Unit entered failed state.
Mar 09 10:32:34 Ubuntu14 systemd[1]: apache2.service: Failed with result 'e...'.
Hint: Some lines were ellipsized, use -l to show in full.

So I have tried to search everywhere for where LoadModule is specified. So I have tried doing this:

$ sudo grep "LoadModule" /

I have also tried this:

sudo find / -type f grep -l "LoadModule"

Still no luck.

Where is the LoadModule specified, in Apache 2.4.12?

I know that in Apache 2.4.7, it is in the apache.conf file, which I have used the same logic here that I have used in the newer version.

This is done on a Virtual Machine, so if an error does happen, I can clean the machine and start again. I am the root user too.

sudo a2enmod xxx.load

$ sudo service apache2 start

$ systemctl restart apache2
$ journal -xe 
$ sudo apt-get purge apache2
$ sudo apt autoremove apache2
$ sudo apt-get purge apache2
$ sudo apt-get purge apache2*
$ sudo apt-get install apache2
$ sudo service apache2 start