object has a envmap which is not a cubemap which will cause D3D errors.

[ApepMenethil]

Hello

I am trying to make my own interior base, at the very beginning I ran into this problem.
I created the new, empty cell, Open it in the rendering window, I select the Object, form the World Objects- Static- Interiors
I move the object to the rendering screen and i get error message

MODELS: VltHallMidQtr : has a envmap which is not a cubemap which will cause D3D errors.
it is an examlpe message, I get the same with all Objects, They doesnt appear in the rendering window,
Any suggestion what I am doing wrong?
In the videos what I watched, They did not set up anything before the new cell, just move into the rendering window and it appers for them, for me nothing.
( tried with already exisiting interior cell, what used the same static world objects like what I would like to do, I also can't make anything appear what I add to them/

Can someone help me please ?