Need help. " Options initialzation failed. please notify the developer.

[iben123]

Hey, i have met an error where i lost my unit frames and i cant open my /realui, when i try to open it i get the msg, " Options initialzation failed. please notify the developer. " and a Lua error, that says

x1 nibRealUI\Core\CombatFader.lua:153: UnitFrames has not yet been registered.
Stack: [C] in function 'assert'
nibRealUI\Core\CombatFader.lua:153: in function 'AddFadeConfig'
nibRealUI_Config\ConfigBar.lua:655: in main chunk
[C] in function 'LoadAddOn'
nibRealUI\Core.lua:389: in function 'LoadConfig'
nibRealUI\Core.lua:503: in function <nibRealUI\Core.lua:501>
Time: 2019/02/02 02:53:00 Index: 1/2
RealUI Version: 2.0.8
Locals:
(*temporary) = nil
(*temporary) = "UnitFrames has not yet been registered."