Please help us by providing the following info. Before posting please also check the pinned "Known issues" threads and make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/
Steps to reproduce
2. Ubuntu 16.04
OC to still work
Page cannot be displayed
OwnCloud.log is blank
Seem to have duplicate doc root directories /var/www/html/ and /var/www, never noticed the latter before?
Operating system: ubuntu 16.04
Web server: apache 2.4.18
Database: MySQL 15.1
PHP version: 7.0.8
ownCloud version (see ownCloud admin page): 9.1.3
Updated from an older ownCloud or fresh install: fresh install, unintentional OC update?
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption):
ownCloud log (data/owncloud.log)
Please paste possible errors in the following code block, see https://central.owncloud.org/t/how-to-find-webserver-or-oc-logfile-enable-php-logfile/808 for more info
Integrity status for oC9+
Login as admin user into your ownCloud and access http://example.com/index.php/settings/integrity/failed paste the results here.
The only error I was able to find anywhere doesn't seem to have any relevance!
[Tue Dec 20 22:03:00.504555 2016] [ssl:warn] [pid 2280] AH01909: owncloud.domain.com:443:0 server certificate does NOT include an ID which matches the server name