Front-End stop working

I install the ReadyNAS Surveillance. but it was not what I was looking for so I uninstall it but the front-end has stop working.
It looks like not all the apache server as the Btsync still works. I can also get into all my shared, FTP and SSH
I shutdown and rebooted the unit with the double press of the power button find but still not working.
I have gone into SSH and

root@MANCH-RN102:~# systemctl status apache2
apache2.service - The Apache HTTP Server
          Loaded: loaded (/lib/systemd/system/apache2.service; enabled)
          Active: inactive (dead) (Result: exit-code) since Sat, 10 Jan 2015 00:31:52 +0000; 6min ago
         Process: 3307 ExecStart=/usr/sbin/apache2 $OPTIONS -k start (code=exited, status=1/FAILURE)
         Process: 3285 ExecStartPre=/frontview/bin/fvapps (code=exited, status=0 /SUCCESS)
          CGroup: name=systemd:/system/apache2.service

root@MANCH-RN102:~# systemctl restart apache2
Job failed. See system journal and 'systemctl status' for details.

as you can see there is a FAILURE. Any ideas??

Thanks