Notice (8): Trying to get property 'nombre' of non-object [APP/Template/Categorias/view.ctp, line 2]

Notice (8): Trying to get property 'nombre' of non-object [APP/Template/Categorias/view.ctp, line 85]

Notice (8): Trying to get property 'introduccion' of non-object [APP/Template/Categorias/view.ctp, line 90]