Klarna Engineering Graduate Program interview questions

I applied through the website and got the link to the abstract reasoning test. Nothing complicated, it's enough to look some videos on YouTube to understand how it works. After I had an interview with an HR. The interview questions were basic: "what are your weakness and strengths". He didn't switch on the camera, called from the mobile, the background was noisy. Also the HR sounded a bit pretentious. He asked about Klarna values and principles which I checked before and I was prepared. After this I received a rejection email without any explanation whatsoever. I replied asking for a reason but got no answer.