Abbott Support Engineer interview questions

I applied for the job online in December, and HR contacted me in February to invite me for an in-person interview with the hiring manager and two peers. We had a great discussion during the interview. However, the following week, I received a rejection message from HR, stating that I did not possess the skills the hiring manager needed. They did not specify which skill sets I was lacking. I believe the lack of chemistry between the hiring manager and me contributed to doubts about my competencies.