I don't know when it exactly happened, but I just updated to 2.2.8.138 on my c-5, and the settings page does not show "Hub Login Security", but I can access it via the /hub/userAdmin url.
Interestingly enough, it shows the back arrows to Settings on the page, but going back does not show the tile for Hub Login Security. This is in Firefox and Edge.
I was able to disable and enable security with no problem.
@neonturbo the url works just fine. I can navigate and toggle the setting just fine. It just does not show up on the main Settings page. Reboot and still missing.