Beyond ΛCDM: Problems,solutions,and the road ahead by Bull, P, Akrami, Y, Adamek, J, Baker, T, Jiménez, J, Bentivegna, E, Camera, S, Clesse, S, Davis, JH, Di Dio, E, Enander, J, Heavens, A, Heisenberg, L, Hu, B, Llinares, C, Maartens, R, Mörtsell, E, Nadathur, S, Noller, J, Pasechnik, R, Pawlowski, MS, Pereira, TS, Quartin, M, Ricciardone, A, Riemer-Sørensen, S, Rinaldi, M, Sakstein, J, Saltas, ID, Salzano, V, Sawicki, I, Solomon, AR, Spolyar, D, Starkman, GD, Steer, D, Tereno, I, Verde, L, Villaescusa-Navarro, F, Von Strauss, M, Winther, HA