See text: "One of the possible solutions would be to invoke an evolving dark energy, with a density that increases as time goes by,” says Guido." INDEED according to Q-FFF theory redshift is also based on the deletion ( Planck length increase) of the vacuum by vacuum absorbing dark matter black hole , scattered all over the universal bubble.
see: http://www.esa.int/Our_Activities/Space_Science/Active_galaxies_point_to_new_physics_of_cosmic_expansion?fbclid=IwAR07kJa_Ks24KRRSj1PoACkRPZ0Dh9NQ8aNej5R6U7QaFkIFXI1haFhtJ-0