error

The Sims 4 Studio - Version 3.0.0.7
System.AggregateException: One or more errors occurred. ---> S4Studio.Blender.BlenderException:
  File "<string>", line 1, in <module>
  File "<string>", line 12, in <module>
  File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\blender.py", line 310, in save_lod
    save_mesh(blender_mesh, new_mesh)
  File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\blender.py", line 213, in save_mesh
    sim_mesh_data = collect_mesh_data(blender_mesh)
  File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\blender\__init__.py", line 206, in collect_mesh_data
    mesh_data.calc_tangents()
RuntimeError: Error: Tangent space computation needs an UVMap, "(null)" not found, aborting



   at S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version) in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Shared\BlenderUtilities.cs:line 248
   at S4Studio.Blender.BlenderUtilities.ImportMlod(String fileName, String mlod, String rig) in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Shared\BlenderUtilities.cs:line 481
   at S4Studio.ViewModels.ObjectLodItem.ImportMesh(BlenderUtilities blender_util, String blender_path) in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Shared\ViewModels\BuildBuy\Objects\ObjectLodItem.cs:line 474
   at S4Studio.ViewModels.ObjectLodItem.<>c__DisplayClass38_0.<ImportMesh>b__0() in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Shared\ViewModels\BuildBuy\Objects\ObjectLodItem.cs:line 456
   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 "<string>", line 1, in <module>
  File "<string>", line 12, in <module>
  File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\blender.py", line 310, in save_lod
    save_mesh(blender_mesh, new_mesh)
  File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\buybuild\blender.py", line 213, in save_mesh
    sim_mesh_data = collect_mesh_data(blender_mesh)
  File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\blender\__init__.py", line 206, in collect_mesh_data
    mesh_data.calc_tangents()
RuntimeError: Error: Tangent space computation needs an UVMap, "(null)" not found, aborting



   at S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version) in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Shared\BlenderUtilities.cs:line 248
   at S4Studio.Blender.BlenderUtilities.ImportMlod(String fileName, String mlod, String rig) in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Shared\BlenderUtilities.cs:line 481
   at S4Studio.ViewModels.ObjectLodItem.ImportMesh(BlenderUtilities blender_util, String blender_path) in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Shared\ViewModels\BuildBuy\Objects\ObjectLodItem.cs:line 474
   at S4Studio.ViewModels.ObjectLodItem.<>c__DisplayClass38_0.<ImportMesh>b__0() in C:\Sims\Studio\Sims4Studio\TheS4Studio\S4Studio.Shared\ViewModels\BuildBuy\Objects\ObjectLodItem.cs:line 456
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()<---