VASL Mod crash on opening map

When I try to open a map in VASL, it just gives an ‘Internal Error’ window. The logfile says:
ava.lang.ExceptionInInitializerError: null
at VASSAL.launch.TilingHandler$MyStateMachineHandler.(TilingHandler.java:234)
at VASSAL.launch.TilingHandler.createStateMachineHandler(TilingHandler.java:327)
at VASSAL.launch.TilingHandler.sliceTiles(TilingHandler.java:506)
at VASL.build.module.map.ASLBoardPicker.tileBoard(ASLBoardPicker.java:460)
at VASL.build.module.map.ASLBoardPicker.getBoard(ASLBoardPicker.java:612)
at VASSAL.build.module.map.BoardPicker.getLocalizedBoard(BoardPicker.java:460)
at VASSAL.build.module.map.boardPicker.BoardSlot.actionPerformed(BoardSlot.java:104)
at java.desktop/javax.swing.JComboBox.fireActionEvent(JComboBox.java:1264)
at java.desktop/javax.swing.JComboBox.setSelectedItem(JComboBox.java:589)
at java.desktop/javax.swing.JComboBox.setSelectedIndex(JComboBox.java:624)

  • Which version of Vassal are you using?
  • Which version of VASL are you using?
  • Please post the full errorLog from a run where you had this problem.