[Neos] Node Tree loading error

[Dominic Garms]

Hello again,

I am not sure what could cause this, but in my installation its 
impossible to drag drop pages into subpage. I get a "Node Tree loading 
error" message and then some weird things happening and I need to clear 
cache. After that I can't select the nested page anymore, I need to drag 
it out of the parent page.

If I choose Chapter and drag a page into a Chapter there is no problem. 
Only from Page into Page it is happening. If I create a page inside of a 
page, all works fine as long as I'm not trying to drag this page into 
another page.

All I adjusted is to start adjusting the NodeType of my package. But 
even if I disable it, the problem stays. Is this a known bug?

Regards,
Dominic