I don't see anything obviously wrong. Jython is built on java, so seeing java information is not a surprise. (And jython help() is not particularly helpful.) More helpful would be the backtrace you get when you try to use it and it fails. But first, make sure the version you choose is compatible with jython 2.5 (Ignition v7.9.x) or jython 2.7 (Ignition v8+). Also see this topic:
{ side note: the "3rd party modules" category is for authors of Ignition add-on modules, like me, to advertise our products. It doesn't refer to 3rd party python modules. Consider changing the category to get wider visibility for your question. }