Speaking to reporters after the loss, Parkinson said: "We've changed the squad around completely. There was always going to be a period at the start where it doesn't go completely as you'd want it. We've got to work this week on the training pitch to put on a performance like we showed at Millwall two weeks ago [when Wrexham won 2-0].
"The previous home games, we looked like we can create chances and score. But the goals we conceded - on one hand, you'll say they were clinical but when we analyse them all, we'll know we could have done better.
"I thought we started the game well and then we had a scrappy period with some mistakes on the ball. The goal really typified that period. We had to clear our lines quicker and be braver in the key moments to keep the ball out of the net. The third goal was just a real killer for us, it knocked the stuffing out of us."