The newest betas/alphas of ButtonFacade do not work with the latest release of SBF.
To get it working again, all you should have to do is change line 3 of SBFButtonFacade.lua from:
Code:
if IsAddOnLoaded("ButtonFacade") and (ButtonFacade ~= nil) then
to
Code:
if IsAddOnLoaded("ButtonFacade") then
Then again this fix is several alpha version of BF old, so something might have changed since then I am not aware of yet.