Failed to call hook 'OnPlayerChat' on plugin 'BetterChat v5.2.12' (InvalidOperationException: Chat channel is set to Team, however the player is not in a team.)
  at Oxide.Plugins.BetterChat.SendBetterChatMessage (Oxide.Plugins.BetterChat+BetterChatMessage chatMessage, ConVar.Chat+ChatChannel chatchannel) [0x00162] in <9f627cb158074f4999a8ea0ec640ada4>:0

  at Oxide.Plugins.BetterChat.OnPlayerChat (BasePlayer bplayer, System.String message, ConVar.Chat+ChatChannel chatchannel) [0x00049] in <9f627cb158074f4999a8ea0ec640ada4>:0

  at Oxide.Plugins.BetterChat.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000ed] in <9f627cb158074f4999a8ea0ec640ada4>:0

  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d431e37658ba4727b7490299d12dfc44>:0

  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <157a94ee66ab4a7991faecd1eb84be3b>:0

  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <157a94ee66ab4a7991faecd1eb84be3b>:0

I'm getting this occasionally too.