Per a post on his Facebook page, Kasperczyk indicates this crash was a result of a brake failure. You can see his right rear tire lock up just before hitting the guardrail. Amazingly, Kasperczyk and co-driver Damain Syty were able to get out of the car and walk away.
Unfortunately, Skoda racer Jan Černý didn’t have the same luck as Kasperczyk when he too crashed into a guardrail later in the same event. Amazingly, he too walked away from this crash, despite rolling over a number of times.