Upgrading to Ubuntu 16.10: package apache2 2.4.18-2ubuntu3.1 failed to install/upgrade: package apache2 is already installed and configured

[Devon]

Upgrade from Ubuntu 16.04 to 16.10 gave this error. Somewhere along installation I got the error message that /var/www/html was not accessible. I have modified that folder contents for a webpage and for some reason the owner was root, not www-data, so maybe that did it. But as far as I know /var/www is a generic folder people put their website data in. Not sure why apache2 got so hung-up over it and spat out errors 3 times with the final one of:

"Errors were encountered while processing:
 apache2
Exception during pm.DoInstall(): E:Sub-process /usr/bin/dpkg returned an error code(1), E:Sub-process /usr/bin/dpkg returned an error code(1)"
Then a message popped up saying upgade failed, and will try running dpkg --configure -a

Then the upgrade quit without completing.

Does anyone know what the final operaiions are to finish installation?
is it just apt-get clean then reboot?
I tried dpkg --configure -a and didn't get anything.

ProblemType: Package
DistroRelease: Ubuntu 16.10
Package: apache2 2.4.18-2ubuntu3.1
ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0
Uname: Linux 4.8.0-26-generic x86_64
Apache2ConfdDirListing: False
ApportVersion: 2.20.3-0ubuntu8
AptdaemonVersion: 1.1.1+bzr982-0ubuntu16
Architecture: amd64
CrashReports:
 640:1000:116:17782989:2016-10-25 10:01:22.523942708 -0400:2016-10-25 10:01:24.527967529 -0400:/var/crash/_usr_share_apport_apport-gtk.1000.crash
 640:0:116:756729:2016-10-25 13:01:01.358550548 -0400:2016-10-25 13:01:02.358550548 -0400:/var/crash/apache2.0.crash
 640:1000:116:1311798:2016-10-25 10:02:11.384215354 -0400:2016-10-25 10:02:12.384215354 -0400:/var/crash/_usr_lib_update-notifier_system-crash-notification.1000.crash
Date: Tue Oct 25 13:01:02 2016
DuplicateSignature:
 package:apache2:2.4.18-2ubuntu3.1
 Setting up apache2-data (2.4.18-2ubuntu4) ...
 dpkg: error processing package apache2 (--configure):
  package apache2 is already installed and configured
ErrorMessage: package apache2 is already installed and configured
InstallationDate: Installed on 2016-09-20 (34 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
RelatedPackageVersions:
 dpkg 1.18.10ubuntu1
 apt 1.3.1
SourcePackage: dpkg
Title: package apache2 2.4.18-2ubuntu3.1 failed to install/upgrade: package apache2 is already installed and configured
UpgradeStatus: Upgraded to yakkety on 2016-10-25 (0 days ago)