Yeah I think that's it. 2/3 years ago David might have saved it, it's often tricky when a shot is hit close to a goalkeeper you think they should do better, but just watch the replay at full speed. It's hit so bloody fast you just can't react in time, by the time he moves his hands to where he thinks it's going it's already bouncing off him into the net. Those sort of shots can't really be classed as an error for me, it's just plus marks if you manage to get to it.
Compare it to the Mount shot where he had plenty of time to adjust and get behind it, or the silly kick out at Everton, now that's a proper error.