Can i know what i should do to fix this?

Assert fail:
vertex.Find(i)==NULL

In file 'Objects\MeshRender.cpp'
At line 319

Continue anyway?

SymInit: Symbol-SearchPath: 'C:\PROGRAM FILES (X86)\STEAM\STEAMAPPS\COMMON\FACERIG\BIN\TOOLS\IMPORTWIZARDNEW\PHIDIAS\;C:\PROGRAM FILES (X86)\STEAM\STEAMAPPS\COMMON\FACERIG\BIN\TOOLS\IMPORTWIZARDNEW\PHIDIAS\MODELEDITOR\PLUGINS\;.;c:\program files (x86)\steam\steamapps\common\facerig\bin\tools\importwizardnew\phidias;C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias;C:\Windows;C:\Windows\system32;', symOptions: 210, UserName: 'GodOf'
DbgHelpPath: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\DbgHelp.dll'
DbgHelpVersion: '6.2.0'
OS-Version: 6.2.9200 () 0x100-0x1

---CallStack---
7B1DF254 (EngineDll10): (filename not available): public: int __thiscall StackWalker::ShowCallstack(void *,struct _CONTEXT const *,int (__stdcall*)(void *,unsigned __int64,void *,unsigned long,unsigned long *,void *),void *)
7B02EAFC (EngineDll10): (filename not available): public: static void __cdecl cDebugSystem::AssertHelper(char const *,char const *,char const *,int)
620303C0 (ModelEditor10_cli): (filename not available): protected: void __thiscall ph::cMesh::UpdateFinalMesh(void)const
6204D0F6 (ModelEditor10_cli): (filename not available): protected: virtual void __thiscall ph::cMesh::DoUpdate(void)const
61F59C90 (ModelEditor10_cli): (filename not available): public: virtual void __thiscall ph::cAnimatable::Update(void)const
6234BE8F (ModelEditor10_cli): (filename not available): protected: virtual void __thiscall ph::cSkinning::DoUpdate(void)const
61F59C90 (ModelEditor10_cli): (filename not available): public: virtual void __thiscall ph::cAnimatable::Update(void)const
62588C9B (ModelEditor10_cli): (filename not available): public: virtual __thiscall ph::iUserData::~iUserData(void)
7B1066B2 (EngineDll10): (filename not available): int __cdecl lua_yield(struct lua_State *,int)
7B111A20 (EngineDll10): (filename not available): void __cdecl lua_close(struct lua_State *)
7B10672B (EngineDll10): (filename not available): int __cdecl lua_yield(struct lua_State *,int)
7B1029B6 (EngineDll10): (filename not available): void __cdecl lua_call(struct lua_State *,int,int)
7B105B53 (EngineDll10): (filename not available): int __cdecl lua_getinfo(struct lua_State *,char const *,struct lua_Debug *)
7B1068DC (EngineDll10): (filename not available): int __cdecl lua_resume(struct lua_State *,int)
7B102A0B (EngineDll10): (filename not available): int __cdecl lua_pcall(struct lua_State *,int,int,int)
7B10119C (EngineDll10): (filename not available): int __cdecl lua_dofile(struct lua_State *,char const *)
6257DD70 (ModelEditor10_cli): (filename not available): public: int __thiscall ph::Lua::cLuaState::DoFile(char const *,int)
61EE594F (ModelEditor10_cli): (filename not available): public: virtual void __thiscall ph::phEdApp::Run(void)
61EF0583 (ModelEditor10_cli): (filename not available): int __cdecl PhidiasMain(struct HINSTANCE__ *,struct HINSTANCE__ *,char *,int)
0043113D (Phidias_cli): (filename not available): (function-name not available)
004313C4 (Phidias_cli): (filename not available): (function-name not available)
75BAFA29 (KERNEL32): (filename not available): BaseThreadInitThunk
76ED76B4 (ntdll): (filename not available): RtlGetAppContainerNamedObjectPath
76ED7684 (ntdll): (filename not available): RtlGetAppContainerNamedObjectPath

---ExtraInfo---
PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\Phidias_cli.exe', SymType: '-nosymbols-'
PDB: 'C:\Windows\SYSTEM32\ntdll.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\KERNEL32.DLL', SymType: '-exported-'
PDB: 'C:\Windows\System32\KERNELBASE.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\MSVCR100.dll', SymType: '-exported-'
PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\ModelEditor10_cli.dll', SymType: '-exported-'
PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\EngineDll10.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\WS2_32.dll', SymType: '-exported-'
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PDB: 'C:\Windows\System32\GDI32.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\ADVAPI32.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\gdi32full.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\DINPUT8.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\msvcrt.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\d3d11.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\msvcp_win.dll', SymType: '-exported-'
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PDB: 'C:\Windows\System32\SHLWAPI.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\dxgi.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\SHELL32.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\MSIMG32.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\XINPUT1_3.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\X3DAudio1_7.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\SETUPAPI.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\cfgmgr32.dll', SymType: '-exported-'
PDB: 'C:\Windows\System32\bcrypt.dll', SymType: '-exported-'
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PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\MkModelLib10.dll', SymType: '-exported-'
PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\GameLib10.dll', SymType: '-exported-'
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PDB: 'C:\Windows\SYSTEM32\d3dx9_43.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\kernel.appcore.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\dwmapi.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\windows.storage.dll', SymType: '-exported-'
PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\TextureConverter.dll', SymType: '-exported-'
PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\SoundLib10.dll', SymType: '-exported-'
PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizardNew\Phidias\ShaderLib10.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\Wldp.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\MSACM32.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\d3dx11_43.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\D3DCOMPILER_43.dll', SymType: '-exported-'
PDB: 'C:\Windows\SYSTEM32\winmmbase.dll', SymType: '-exported-'
PDB: 'C:\Program Files (x86)\Steam\steamapps\common\FaceRig\Bin\Tools\ImportWizar