Was it, really though?
Maybe as a keeper, I'm overly defensive of them sometimes, but I hate the narrative that ANY goal at the near post is a keeper error. De Gea has left only the TINIEST of gaps there, and Stanislas has found that spot and hit it well, from about 4 yards away. De Gea is left hopelessly exposed by Maguire getting humiliated by the forward in the first place, and has litle option but to hedge his bets to try to protect the goal, AND cover the pass to Solanke waiting for a tap-in.
There's people on here who blamed Matt Ryan for Enda Stevens thunderbolt at Bramall Lane, on the grounds of 'near post'. Its a nonsense.
TBF as a keeper you probably also know how easy it is (or not) to cover the near post and not get beaten at the far post at the same time. The narrative comes from almost all pundits almost all the time, but I guess not many pundits are ex keepers.
De Gea had a shocker of a game though. His passing was all over the place and he seems not to inspire any confidence in his defence, having made genunie howlers throughout the season.