luceos Reinstalled with this command and still have error ?
error.log is clear
[Thu Feb 23 21:00:00.570114 2017] [mpm_prefork:notice] [pid 20657] AH00169: caught SIGTERM, shutting down
[Thu Feb 23 21:00:01.595595 2017] [mpm_prefork:notice] [pid 21924] AH00163: Apache/2.4.7 (Ubuntu) configured -- resuming normal operations
[Thu Feb 23 21:00:01.595642 2017] [core:notice] [pid 21924] AH00094: Command line: '/usr/sbin/apache2'