(Reading database ... 232493 files and directories currently installed.)
Preparing to unpack .../apache2-bin_2.4.7-1ubuntu4.4_amd64.deb ...
Unpacking apache2-bin (2.4.7-1ubuntu4.4) over (2.4.7-1ubuntu4.1) ...
Preparing to unpack .../apache2-data_2.4.7-1ubuntu4.4_all.deb ...
Unpacking apache2-data (2.4.7-1ubuntu4.4) over (2.4.7-1ubuntu4.1) ...
Selecting previously unselected package apache2.
Preparing to unpack .../apache2_2.4.7-1ubuntu4.4_amd64.deb ...
Unpacking apache2 (2.4.7-1ubuntu4.4) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Processing triggers for ureadahead (0.100.0-16) ...
Processing triggers for ufw (0.34~rc-0ubuntu2) ...
Setting up apache2-bin (2.4.7-1ubuntu4.4) ...
Setting up apache2-data (2.4.7-1ubuntu4.4) ...
Setting up apache2 (2.4.7-1ubuntu4.4) ...
ERROR: Module mpm_event does not exist!
dpkg: error processing package apache2 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 apache2
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
Setting up apache2 (2.4.7-1ubuntu4.4) ...
ERROR: Module mpm_event does not exist!
dpkg: error processing package apache2 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 apache2