I installed Omeka-s with success.
I have Php 5.6.25; MySQL 5.7.14; Apache 2.4.23
When i want to add a media i have a problem with the menu on the right side. Only HTML menu seems good. The others are unknown (for example unknown [upload]; unknown [url], …)
Are you sure you’ve done the installation from a published released version of Omeka S? And that all your files are readable by your HTTP server (according file user rights)?