just how?

something i have made myself. I just want to put it into the game, I have all the programs i need, Im a qualified 3d modeller so im not a newb at modelling everyu time i go to import all I get is this ; 

The Sims 4 Studio - Version 3.1.0.7

System.AggregateException: One or more errors occurred. ---> S4Studio.Blender.BlenderException:

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\avastar\rig.py", line 2961, in sync_timeline_action

from . import animation

SystemError: Parent module 'avastar' not loaded, cannot perform relative import



at S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version)

at S4Studio.Blender.BlenderUtilities.InstallAddon()

at S4Studio.ViewModels.ObjectLodItem.<>c__DisplayClass38_0.<ImportMesh>b__0()

at System.Threading.Tasks.Task.InnerInvoke()

at System.Threading.Tasks.Task.Execute()

--- End of inner exception stack trace ---

---> (Inner Exception #0) S4Studio.Blender.BlenderException:

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\avastar\rig.py", line 2961, in sync_timeline_action

from . import animation

SystemError: Parent module 'avastar' not loaded, cannot perform relative import



at S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version)

at S4Studio.Blender.BlenderUtilities.InstallAddon()

at S4Studio.ViewModels.ObjectLodItem.<>c__DisplayClass38_0.<ImportMesh>b__0()

at System.Threading.Tasks.Task.InnerInvoke()

at System.Threading.Tasks.Task.Execute()<---






wth 

Thank you for letting me know this is why im getting the error. Not about wasting time, about going into too much detail and rambling on when there neednt be that much detail. You dont need a 45 min tutorial on importing something if it's literally 3 buttons you press. Thats what im getting at 

so, I have my model, I followed the steps. I have a random shadow base I cant get rid of (red) and no matter the color I cant get alpha transparency in the windows (yellow) I have followed the steps from here sims4studio.com/thread/1037/make-object-transparency-add-alpha and it doesnt work. About to give up on this...