Documentation incomplete


i’m trying to use the documentation however I struggle as many article shows the documentation menu.

For exemple if you try to follow the behavior tree basic setup, at the step 4 you don’t have documentation content but you get back to the home menu:

Hi,TheOneGazou.I think guys from Epic rebuilding the website,and its currently unavailable.I’ve attach a link to also good tutorial about BT,start with it and i think they will update it soon.
Unreal Engine 4 Tutorial: Artificial Intelligence | and also a good start is the twitch
Getting Started with AI | Live Training | Unreal Engine - YouTube