How can I fix the cloth physics bug that goes through the ped ?

I have a project about a new map, everything is done, but only NPCs can't walk in the map, can someone guide and explain how I can make npc move around in the map?

System.NullReferenceException: Object reference not set to an instance of an object.
at ThorScript.ThorScript.SetPedAsAllyOrEnemy(Boolean AsAlly, PoweredUser user, ProfileSetting profile)
at ThorScript.ThorScript.ProfileMenu_OnItemSelect(UIMenu sender, UIMenuItem selectedItem, Int32 index, MenuCfgPair custompair, ProfileSetting profile)
at ThorScript.ThorScript.<>c__DisplayClass86_0.<InitProfileMenuItems>b__0(UIMenu menu1, UIMenuItem item1, Int32 index1)
at SimpleUI.ItemSelectEvent.Invoke(UIMenu sender, UIMenuItem selectedItem, Int32 index)
at SimpleUI.UIMenu.Draw()
at SimpleUI.MenuPool.Draw()
at ThorScript.ThorScript.ManageMenu()
at ThorScript.ThorScript.OnTick(Object sender, EventArgs e)
at System.EventHandler.Invoke(Object sender, EventArgs e)
at GTA.Script.raise_Tick(Object value0, EventArgs value1)
at GTA.Script.MainLoop()