SecurityException in the autoplayer daily tests

One of my daily tests for the autoplayer fails due a SecurityException. When is this exception thrown? The message states that my implementation tries to access restricted classes or methods.
My autoplayer only uses my own classes from the autoplayer package as well as my classes from the other packages, for instance my own TetrisGame implementation to simulate game scenarios or the Move enum. However, the autoplayer’s communication to the outside only involves the given interfaces.
Further, I restricted myself to classes from the java.util (and java.lang…) package.

When unallowed actions are performed that might compromise secret data.

The problem was probably a System.out.println in your autoplayer.
Your latest commit has no security exceptions.