MuleSoft Software Engineering interview questions

I had applied on the company website and received a coding challenge in the very week. Once I finished and submitted the coding challenge, I received a phone call for recruiter and was scheduled 1 interview for 45 mins. Later I was asked to schedule 3 back-to-back interviews with the team members and VP of engineering. The interviews went well but after around 15-20 I got a reject from the recruiter.