CakePHP Auth redirect problem

Today I lost a good two hours trying to find a solution to a ‘weird’ problem. I was having the issue – after implementing the Auth component in CakePHP 2.1 – that after logging in, the app didn’t redirect properly. At least that was what my browser was telling me. After my long Google search with only ‘ancient’ results for problems and bugs with the Auth system that didn’t exist anymore I finally had my Eureka moment. Drum roll please