The latest version of Subsonic (6.1.6) does not suport Java SE 9 or later
because it depends on the JAXB APIs. Those are considered to be Java EE
APIs are no longer contained on the default classpath in Java SE 9 and
are completely removed in Java SE 11..
(cherry picked from commit 14c5fe8c1b61c957ad45d0df801c7928d9e4d134)