Unable to enable tenants - Features screen not available in Configuration

I am unable to enable the new tenants functionality as I don’t have the Features configuration screen. I am using Octopus 3.4.0 RTW. What do I need to do to enable it?

Features screen also showing after returning from lunch. See new screen shot.

Strange thing is that in my previous screen shot, the version number was showing correctly on the help menu, but the configurations screen hadn’t loaded the Features selection. So the web page was loading at least partially from the server and not some cached version…