• Could not deduce (MonadFail m) arising from a use of ‘fail’
      from the context: Monad m
        bound by the type signature for:
                   getVars :: forall (m :: * -> *).
                              Monad m =>
                              [(String, String)] -> Content -> m [(Deref, VarType)]
        at Text/Internal/Css.hs:292:1-75
      Possible fix:
        add (MonadFail m) to the context of
          the type signature for:

    • No instance for (MonadFail Data.Functor.Identity.Identity)
        arising from a use of ‘getVars’
    • In the first argument of ‘mapM’, namely ‘(getVars scope0)’
      In the second argument of ‘($)’, namely
        ‘mapM (getVars scope0) contents’
      In the second argument of ‘($)’, namely
        ‘runIdentity $ mapM (getVars scope0) contents’
    |
126 |     concat $ runIdentity $ mapM (getVars scope0) contents
    |                                  ^^^^^^^^^^^^^^