Error: The axis Vector3 (nan, nan, nan) must be normalized.

[Kazox61]

I got an error using the GPUTrail3D:

E 0:00:10:0151   GPUTrail3D.gd:206 @ _update_billboard_transform(): The axis Vector3 (nan, nan, nan) must be normalized.
  <C++ Error>    Condition "!p_axis.is_normalized()" is true.
  <C++ Source>   core/math/basis.cpp:857 @ set_axis_angle()
  <Stack Trace>  GPUTrail3D.gd:206 @ _update_billboard_transform()
                 GPUTrail3D.gd:193 @ _process()

[Kazox61]

Also i get this Error message at the same Time:

E 0:00:10:0151   instance_set_transform: Condition "!v.is_finite()" is true.
  <C++ Source>   servers/rendering/renderer_scene_cull.cpp:957 @ instance_set_transform()

[celyk]

How can I reproduce it?