I entered the shadowlands from the direction of the temple with the gith creche.
After a short walk you reach a group of absolute cultists.
Near those cultists (where the hyena runs of) are some enemies (cursed trees).
I started fighting them and the cultists helped me.
Their leader jumped up to a higher level, if there was a way up it was destroyed during battle.
So after combat he was stuck up there with no way to walk back (jumping back is no problem but he does not do it).
-- save game here --
I talked to him and summoned the guide.
I told the guide to start but he stayed where he was ---> this is where I got stuck in my progress
idea 1: shove absolute leader down to their camp ---> he was not damaged, but everyone attacked my group ---> reload
idea 2: Move all characters but 1 far away. Hide this character behind the leader (fortuanatly he looked to the camp). Shove him to the camp. ---> He walks to his default position, now I can proceed.
solution: NPC should be able to jump outside of combat if they cannot reach their position with walking.
PS: When I talk to the leader to summon the guide, the scene shows him in his default position even though he was standing somewhere else.

Prof. Dr. Dr. Mad S. Tist

World leading expert of artificial stupidity.
Because there are too many people who work on artificial intelligence already