Raul Jimenez put his side in front in the 70th minute after shoving away United's defenders, swivelling around and tucking in a loose ball.
"It was a big step backwards, I have to say".
The Norwegian said his team's performance in the 2-1 defeat at Molineux was the "poorest" of his time in charge at Old Trafford as United slumped to back-to-back defeats for the first time since Jose Mourinho's final two games as manager.
"I can't really comment on Gareth Bale or specific players because they're property of other clubs but we should look for quality players, definitely, and players who could improve us as a team", said Solskjaer. Last week [at Arsenal], we were happy with the performance but, today, we didn't have the urgency or the quality on the ball. So yes, we can go all the way but you've got to be lucky and good along the way.
United now have two weeks before they next play with the upcoming worldwide break. It's very disappointing that we're not in the semis.
However, the whistle was blown soon after, sealing United's first successive defeat since Solskjaer took over as caretaker manager.
"Wolves have already beaten Liverpool under the lights in the FA Cup, in round three, but Jurgen Klopp made a lot of changes for that game, and I don't see Solskjaer doing the same".
"But of course, you can't sit down and sulk too long".
"In the second half, I think we managed the ball better".
"It means a lot, the FA Cup is the oldest competition there is, we played well and we achieved this with the awesome support of our fans, pushing us, believing in us, the noise was fantastic and we did it together", Nuno told a news conference.
"Because they did their part, the noise was fantastic through the game".