He said the players have only themselves to blame for allowing the League One earn the draw and force a replay.
A Curtis Jones strike and an own goal from Donald Love had put Liverpool in a comfortable lead until Jason Cummings came on from the substitute bench to score twice for the hosts inside 15 minutes.
Klopp pointed to a succession of poor passes from his side, particularly out of defence, as giving Shrewsbury the momentum to embark on a famous comeback.
“First and foremost I have to say congratulations to Shrewsbury, it was well deserved,” he said. “It was the minimum they deserved with the chances they had.
“Why they had the chances? Because we lost the ball in the wrong moment, we played a few really difficult passes which were difficult to control.
“We never got used to the pitch 100% today and that kept them in the game.
“We scored a wonderful goal to make it 1-0, really good football and a really nice goal.
“Then we got the gift, the present immediately after half-time of them scoring our second goal themselves.
“But it didn’t give us a chance to calm the game down or whatever.
“We conceded the penalty after losing the ball and they had a counter-attack. The second goal we lost two challenges in a row and they finished the situation off really brilliantly. That’s it.”
