Hi,
I am trying to make a wing flex animation for my glider after watching Madolo’s tutorial on youtube (https://www.youtube.com/watch?v=P88dMAGfgFo). First I made left wing wing aileron and aibrakes and everything was working, but then when I moved to the right wing I cant get it to work (left one still works good). I guess that I must have made a simple mistake but cant find where. Inspector is telling me “Node without Unique ID while using the unique_id extension, nodes[145] : ‘neutral_bone’” (see picture). I tried fixing the problem in many ways creating many new bone structers from zero but nothing worked. Here are few screenshots to get you an overall look but I dont even know what should I preciselly take photo of, so ask if you need certain screenshots for diagnosing the problem 
Okey so I have found a solution!
So the problem was that some vertices were not weight painted. On the right wing I did not weight paint the part with zero dihedral because I decided to make it still. So the conclusion would be: even if you have a non moving bones in your armature, make sure all vertices are weightpainted to at least one bone, and that bone is called neutral bone. In other words neutral bone holds the weight of verts that dont move. In other case if you dont assign those non moving verts to any bone then armature wont work.
In the picture you can see that non moving wing part is asigned to bone001. Also I have base bone so In that case I could just delete bone001 and assign all that weight to also non moving base bone.
Hope someone will find it helpful! It took me 3 days to diagnose…
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