Add an App

Where did the apps go like plex and joomla etc? When I click the plus to add an app the list is empty. The wd.com web link also goes to page not found?
https://www.wdc.com/nasapps

This is the current link for NAS apps (It was changed recently alongside the website overhaul):

Both Plex and Joomla are still featured.

Have seen that page and all the glory it advertises, but still no way to get to the Arcus download from that page either.