What course should I study at University if I dont know what career path I want to follow yet?

I would start by asking what your interests are and what you are passionate about. It is important to think of what you will enjoy studying at University and what you would be interested in learning more about and exploring further. No matter what you study you will have access to a wide range of career options, people in Banks today studied a range of courses like Art, Spanish and so on. What is important is finding what your interests are as that is the key to doing well at University.
Another example of the flexibility that comes with choosing a career after University is that people who studied various courses but then wanted to be a lawyer were still able to get Law contracts and go to law school before starting their jobs to ensure they were well prepared.
They are no hard rules! Follow your passion and enjoy your university experience, you will discover a lot more about yourself!