The rose-colored glasses are coming off for Jennifer Lopez and Ben Affleck nearly two years after tying the knot, according to a sensational report. Insiders close to Bennifer said she appeared downcast and not her usual “bubbly” self despite putting on a brave face for cameras at the premiere of her new Netflix film, Atlas, at the Egyptian Theatre in Los Angeles, California, on May 20, RadarOnline.com has learned. “There weren’t a lot of big smiles, even for photographers,” an eyewitness told Us Weekly, noting that Lopez did have her wedding band on but not her stunning 8.5-carat diamond enga…