Just got this tonight. All they did was say hello in global chat.
Failed to call hook 'OnPlayerChat' on plugin 'BetterChat v5.2.14' (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) [0x0014b] in <9e03026c9cb94b859e8c53b632eb8cc2>:0
at Oxide.Plugins.BetterChat.OnPlayerChat (BasePlayer bplayer, System.String message, ConVar.Chat+ChatChannel chatchannel) [0x00041] in <9e03026c9cb94b859e8c53b632eb8cc2>:0
at Oxide.Plugins.BetterChat.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000ed] in <9e03026c9cb94b859e8c53b632eb8cc2>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <795304323ac74a298b8ed190a1dfa739>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <beb2b64691c64e2b95b99491bd85442c>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <beb2b64691c64e2b95b99491bd85442c>:0
Failed to call hook 'OnPlayerChat'
the same thing, when a player writes in team chat, this error pops up
Same thing happening to us. This hasn't been updated in a year -- it needs an update.