PSG host relegation battling Le Havre on Saturday
Liverpool suffered a shock defeat at Bournemouth on Sunday, losing 4-3 in the dying minutes after opening up a 3-1 second-half lead.
The squad flew to Barcelona straight after the loss and are due to train in the city on Tuesday before visiting the Nou Camp to watch the Spanish giants take on Borussia Moenchengladbach in the Champions League.
"In these moments you can get stronger," Klopp told the club website.
"That's what we will be after this experience - and in the next game, we can already show that."
Liverpool return to Merseyside on Wednesday to prepare for the visit of 17th-placed West Ham, who lost 5-1 at home to Arsenal on Saturday.