I've installed the latest Owncloud 9.1.1 (stable) and there is no upload button or no files (even the example ones) on the web. Via the iphone app it all looks ok - and I can upload there no problem. Just the web is not there.
Operating system: Ubuntu 16.04.1 LTS
Web server: Apache/2.4.18 (Ubuntu)
PHP version: PHP 7.0.8-0ubuntu0.16.04.3
ownCloud version : 9.1.1 (stable)
Updated from an older ownCloud or fresh install: Fresh install
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption): SSL
Integrity status for oC9+
No errors have been found.