Navigation Agent debug error

Godot Version

4.6.2

Question

One of my scenes causes the following message to appear in the Debugger:

nav_char_avoiding.gd @ _on_navigation_agent_3d_velocity_computed(): Parameter “space” is null.

I read somewhere that similar errors might be a physics object that cant be instantiated in the location theyre put in, but i cant track down this error … any suggestions?