I'd be pissed off if one of my mates conceded a goal from an error like that in five a side, let alone a Europa League quarter final. Age notwithstanding.
Doesn't excuse an error like that, but it does make calls to sell him look rather short-sighted at best IMO. He's a young kid with a lot to learn. I hope he learns it at NUFC.
FWIW I never said I wanted to sell him I think that view is a bit knee-jerk to say the least.
He needs a spell out of the team imo. Haidara should be given a chance when he's fit.