chat frame lua error
 

i am not 100% sure this is NUi issue but since it is the ui interface I use while questing I keep getting this error message I am using NUi 5.07.26:

11x FrameXML\ChatFrame.lua:4006: attempt to perform arithmetic on a nil value
FrameXML\ChatFrame.lua:4006: in function "ChatEdit_UpdateHeader"
FrameXML\ChatFrame.lua:3708: in function "ChatEdit_ResetChatType"
FrameXML\ChatFrame.lua:3780: in function <FrameXML\ChatFrame.lua:3764>
FrameXML\ChatFrame.lua:3790: in function "ChatEdit_DeactivateChat"
FrameXML\InterfaceOptionsPanels.lua:694: in function "InterfaceOptionsSocialPanelChatStyle_SetChatStyle"
FrameXML\InterfaceOptionsPanels.lua:623: in function <FrameXML\InterfaceOptionsPanels.lua:610>

Locals:
self = ChatFrame2EditBox {
0 = <userdata>
headerSuffix = ChatFrame2EditBoxHeaderSuffix {}
focusLeft = ChatFrame2EditBoxFocusLeft {}
focusRight = ChatFrame2EditBoxFocusRight {}
chatFrame = ChatFrame2 {}
addSpaceToAutoComplete = true
tabCompleteTableIndex = 1
focusMid = ChatFrame2EditBoxFocusMid {}
header = ChatFrame2EditBoxHeader {}
}