Below error appears in console for Team creation, invites, etc:

Failed to call hook 'OnTeamCreated' on plugin 'TeamsLogger v1.5.1' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.TeamsLogger.PrintingMessages (BasePlayer player, System.String log) [0x0000b] in :0 
  at Oxide.Plugins.TeamsLogger.KeyType (BasePlayer player, System.String key, System.Object[] args) [0x0000a] in :0 
  at Oxide.Plugins.TeamsLogger.OnTeamCreated (BasePlayer player, RelationshipManager+PlayerTeam team) [0x00023] in :0 
  at Oxide.Plugins.TeamsLogger.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x001d6] in :0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <60c318df79ed41688ea59335e48d61ad>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <50629aa0e75d4126b345d8d9d64da28d>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <50629aa0e75d4126b345d8d9d64da28d>:0  ​

I'll look into it when I get home, thanks for letting me know.