package apache2 2.4.18-2ubuntu3.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Pebas]

Errors were encountered while processing:
 apache2

E: Sub-process /usr/bin/dpkg returned an error code (1)
Failed to perform requested operation on package. Trying to recover:
Setting up apache2 (2.4.18-2ubuntu3.1) ...

ERROR: Module mpm_prefork is enabled - cannot proceed due to conflicts. It needs to be disabled first!

dpkg: error processing package apache2 (--configure):
 subprocess installed post-installation script returned error exit status 1

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: apache2 2.4.18-2ubuntu3.1
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
Apache2ConfdDirListing: False
Apache2Modules:
 Error: command ['/usr/sbin/apachectl', '-D DUMP_MODULES'] failed with exit code 1: apache2: Syntax error on line 140 of /etc/apache2/apache2.conf: Syntax error on line 1 of /etc/apache2/mods-enabled/php5.load: Cannot load /usr/lib/apache2/modules/libphp5.so into server: /usr/lib/apache2/modules/libphp5.so: cannot open shared object file: No such file or directory
 Action '-D DUMP_MODULES' failed.
 The Apache error log may have more information.
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Sun Sep 18 10:58:48 2016
DuplicateSignature:
 package:apache2:2.4.18-2ubuntu3.1
 Installing new version of config file /etc/apache2/sites-available/default-ssl.conf ...
 ERROR: Module mpm_prefork is enabled - cannot proceed due to conflicts. It needs to be disabled first!
 dpkg: error processing package apache2 (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2016-09-12 (6 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: apache2
Title: package apache2 2.4.18-2ubuntu3.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
error.log: Error: [Errno 2] No such file or directory: '/var/log/apache2/error.log'

[Joshua Powers (powersj)]

Thank you for your report.

This looks like a local configuration problem, rather than a bug in Ubuntu.

You can find pointers to get help for this sort of problem here: http://www.ubuntu.com/support/community

Since we use this bug tracker to track bugs in Ubuntu, rather than configuration problems, I'm marking this bug as Invalid. This helps us to focus on fixing bugs in Ubuntu.

If you believe that this is really a bug, then you may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. We'd be grateful if you would then provide a more complete description of the problem, explain why you believe this is a bug in Ubuntu rather than a problem specific to your system, and then change the bug status back to New.

[Launchpad Janitor (janitor)]

[Expired for apache2 (Ubuntu) because there has been no activity for 60 days.]