[SOLVED] mesh import error

I wanted to import my Kylo Ren Mask, but after half an hour importhing this error message pops ip:

The Sims 4 Studio - Version 3.1.0.9

System.AggregateException: One or more mistakes happened. ---> S4Studio.Blender.BlenderException:

File "<string>", line 1, in <module>

File "<string>", line 41, in <module>

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 626, in write

rcol.get_block_index(self, self.ROOT_REFERENCE_TYPE)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 525, in get_block_index

block.write_rcol(stream, self)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\cas\geometry.py", line 460, in write_rcol

s.u16(index)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 231, in u16

self.u(data, 16, order)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 210, in u

elif size == 16: self.write('H', data, order)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 183, in write

self.f.write(struct.pack(l, data))

struct.error: ushort format requires 0 <= number <= USHRT_MAX





At the following place: S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version)

At the following place: S4Studio.Blender.BlenderUtilities.ImportGeom(String custom_blend, String custom_geom, Int32 body_type, String cut)

At the following place: S4Studio.ViewModels.CAS.CASLODItem.ImportMesh(BlenderUtilities blender_util, String blender_path)

At the following place: S4Studio.ViewModels.CAS.CASStandalone.<>c__DisplayClass71_0.<ExecuteImportMesh>b__0()

At the following place: System.Threading.Tasks.Task.InnerInvoke()

At the following place: System.Threading.Tasks.Task.Execute()

--- Vége a belső kivételek veremkivonatának ---

---> (0 number inner expection) S4Studio.Blender.BlenderException:

File "<string>", line 1, in <module>

File "<string>", line 41, in <module>

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 626, in write

rcol.get_block_index(self, self.ROOT_REFERENCE_TYPE)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 525, in get_block_index

block.write_rcol(stream, self)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\cas\geometry.py", line 460, in write_rcol

s.u16(index)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 231, in u16

self.u(data, 16, order)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 210, in u

elif size == 16: self.write('H', data, order)

File "C:\Users\[UserName]\AppData\Roaming\Blender Foundation\Blender\2.70\scripts\addons\s4studio\io.py", line 183, in write

self.f.write(struct.pack(l, data))

struct.error: ushort format requires 0 <= number <= USHRT_MAX





At the following place: S4Studio.Blender.BlenderUtilities.RunBlender(String script, String blend, Boolean background, Boolean check_version)

At the following place: S4Studio.Blender.BlenderUtilities.ImportGeom(String custom_blend, String custom_geom, Int32 body_type, String cut)

At the following place: S4Studio.ViewModels.CAS.CASLODItem.ImportMesh(BlenderUtilities blender_util, String blender_path)

At the following place: S4Studio.ViewModels.CAS.CASStandalone.<>c__DisplayClass71_0.<ExecuteImportMesh>b__0()

At the following place: System.Threading.Tasks.Task.InnerInvoke()

At the following place: System.Threading.Tasks.Task.Execute()<---

How could I fix this? /Some of the lines are translated from Hungarian)