When using version 1.61 in an Android project, I get Unsupported class version number [53.0] (maximum 52.0, Java 1.8) on the class module-info.class. Class version 53.0 is Java9. There is no such ...

Exception in thread "main" java.lang.UnsupportedClassVersionError: weka/gui/GUIChooser : Unsupported major.minor version 52.0 Probably not my place to say but you’re picking something up compiled with ...