We were 'blissfully ignorant''of' the problems that had occurred.
She was 'ignorant' about the dangers of the drug.
They were 'ignorant' [='unaware'] 'of' the facts.
(..) that I may pour my spirits in thine ear and chastise with the valour of my tongue all that impedes thee from the golden round. Thy letters have transported me beyond this ignorant present and I feel now the future in the instant. My dearest love, Duncan comes here tonight. And when goes hence? (..)2015 Macbeth