error thing

Assembly-CSharp >> Exception in askChat: System.NullReferenceException: Object reference not set to an instance of an object
  at Rocket.Core.Permissions.RocketPermissionsManager.GetGroups (Rocket.API.IRocketPlayer player, System.Boolean includeParentGroups) [0x00000] in <de2b2fb669424d2dae1c4b01e1864fe9>:0
  at Rocket.Unturned.Player.UnturnedPlayer.get_Color () [0x0003e] in <8aee6b7e91964adea5e9d629d8f4f8cb>:0
  at Rocket.Unturned.Chat.UnturnedChat.handleChat (SDG.Unturned.SteamPlayer steamPlayer, SDG.Unturned.EChatMode chatMode, UnityEngine.Color& incomingColor, System.Boolean& rich, System.String message, System.Boolean& cancel) [0x00012] in <8aee6b7e91964adea5e9d629d8f4f8cb>:0
Exception has been thrown by the target of an invocation.
  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00048] in <e1319b7195c343e79b385cd3aa43f5dc>:0
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <e1319b7195c343e79b385cd3aa43f5dc>:0
  at SDG.Unturned.SteamChannel.receive (Steamworks.CSteamID steamID, System.Byte[] packet, System.Int32 offset, System.Int32 size) [0x003bb] in <dc22fd9b4f064c74bd979ffc8a552ac4>:0
Object reference not set to an instance of an object
  at Rocket.Core.Permissions.RocketPermissionsManager.HasPermission (Rocket.API.IRocketPlayer player, System.Collections.Generic.List`1[T] permissions) [0x00000] in <de2b2fb669424d2dae1c4b01e1864fe9>:0
  at Rocket.API.IRocketPermissionsProviderExtensions.HasPermission (Rocket.API.IRocketPermissionsProvider rocketPermissionProvider, Rocket.API.IRocketPlayer player, Rocket.API.IRocketCommand command) [0x0004a] in <c9edc53e2c6249aa938a273f4d7526e8>:0
  at Rocket.Unturned.Permissions.UnturnedPermissions.CheckPermissions (SDG.Unturned.SteamPlayer caller, System.String permission) [0x00053] in <8aee6b7e91964adea5e9d629d8f4f8cb>:0
  at Rocket.Unturned.U+<>c.<bindDelegates>b__16_3 (SDG.Unturned.SteamPlayer player, System.String text, System.Boolean& shouldExecuteCommand, System.Boolean& shouldList) [0x00022] in <8aee6b7e91964adea5e9d629d8f4f8cb>:0
  at SDG.Unturned.ChatManager.process (SDG.Unturned.SteamPlayer player, System.String cmd, System.Boolean fromUnityEvent) [0x0005f] in <dc22fd9b4f064c74bd979ffc8a552ac4>:0
  at SDG.Unturned.ChatManager.askChat (Steamworks.CSteamID steamID, System.Byte flags, System.String text) [0x001ed] in <dc22fd9b4f064c74bd979ffc8a552ac4>:0
  at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00032] in <e1319b7195c343e79b385cd3aa43f5dc>:0