i get this error when i try to config the roll bar

Message: Interface\AddOns\Dominos_Roll\rollBar.lua:30: attempt to index local 'frame' (a nil value)
Time: 11/22/16 04:50:44
Count: 1
Stack: Interface\AddOns\Dominos_Roll\rollBar.lua:30: in function Layout' Interface\AddOns\Dominos\core\frame.lua:178: in function SetPadding'
Interface\AddOns\Dominos_Config\widgets\panel.lua:256: in function SetSavedValue' Interface\AddOns\Dominos_Config\widgets\slider.lua:132: in function <Interface\AddOns\Dominos_Config\widgets\slider.lua:127> [C]: in function SetValue'
Interface\AddOns\Dominos_Config\widgets\slider.lua:185: in function UpdateValue' Interface\AddOns\Dominos_Config\widgets\slider.lua:124: in function OnRender'
Interface\AddOns\Dominos_Config\widgets\utility.lua:26: in function <Interface\AddOns\Dominos_Config\widgets\utility.lua:24>

Locals: self = DominosFrameroll {
0 =
header = {
}
id = "roll"
sets =

{
}
menu = DominosOptions_Frame_1 {
}
tooltipText = "Displays frames for rolling on items, when in a group."
}
frame = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index local 'frame' (a nil value)"