Train studders then player crashes

[1:18 PM] > (ipadress)/(steamid)/GhostRayne disconnecting: Exception (cs:74232): NullReferenceException: Object reference not set to an instance of an object. MainCamera.get_Raycast () (at <00000000000000000000000000000000>:0) ConVar.Entity.clspawn (System.String name) (at <00000000000000000000000000000000>:0) System.Action`1[T].Invoke (T obj) (at <00000000000000000000000000000000>:0) ConsoleSystem.Internal (ConsoleSystem+Arg arg) (at <00000000000000000000000000000000>:0) ConsoleSystem.Run (ConsoleSystem+Option options, System.String strCommand, System.Object[] args) (at <00000000000000000000000000000000>:0) ConsoleSystem+Index+<>c.<Initialize>b__4_0 (System.String strCommand, System.Boolean pressed) (at <00000000000000000000000000000000>:0) System.Action`2[T1,T2].Invoke (T1 arg1, T2 arg2) (at <00000000000000000000000000000000>:0) Facepunch.Input+Button.RunBindImpl (System.String bind, System.Boolean pressed) (at <00000000000000000000000000000000>:0) Facepunch.Input+Button.RunBinds (System.Boolean pressed) (at <00000000000000000000000000000000>:0) Facepunch.Input+Button.Update () (at <00000000000000000000000000000000>:0) Facepunch.Input.Update () (at <00000000000000000000000000000000>:0) MainMenuSystem.Update () (at <00000000000000000000000000000000>:0) UnityEngine.Debug:LogException(Exception) ConsoleSystem:Internal(Arg) ConsoleSystem:Run(Option, String, Object[]) <>c:<Initialize>b__4_0(String, Boolean) System.Action`2:Invoke(T1, T2) Facepunch.Button:RunBindImpl(String, Boolean) Facepunch.Button:RunBinds(Boolean) Facepunch.Button:Update() Facepunch.Input:Update() MainMenuSystem:Update()