UnitAura error

[cosmabgd]

hello . i am new here and new on addon projects. I am trying to resurect an old addon tauntmaster 2 but i get some error and i dont understand where is the problem. i am searching for a little help . thank you

error :
Message: Interface\AddOns\TauntMaster2\Gui\TauntMasterGUI.lua:399: Usage: UnitAura("unit", [index][, "filter"])
Time: Thu Oct 4 12:03:49 2018
Count: 67
Stack: Interface\AddOns\TauntMaster2\Gui\TauntMasterGUI.lua:399: Usage: UnitAura("unit", [index][, "filter"])
[C]: in function `UnitAura'
Interface\AddOns\TauntMaster2\Gui\TauntMasterGUI.lua:399: in function <Interface\AddOns\TauntMaster2\Gui\TauntMasterGUI.lua:398>

Locals: (*temporary) = "player"
(*temporary) = nil
(*temporary) = nil
(*temporary) = "HELPFUL"