After recent Max OS upgrade I am not able Open or Import a module after launching VASSAL. Just seeing a gray window with the 'To start playing ....' message.
Here's snippet from the logs....
2019-06-29 16:27:38,499 [0-main] INFO VASSAL.launch.StartUp - Starting
2019-06-29 16:27:38,504 [0-main] INFO VASSAL.launch.StartUp - OS Mac OS X 10.15
2019-06-29 16:27:38,505 [0-main] INFO VASSAL.launch.StartUp - Java version 1.8.0_111
2019-06-29 16:27:38,505 [0-main] INFO VASSAL.launch.StartUp - VASSAL version 3.2.17
2019-06-29 16:27:38,992 [0-AWT-EventQueue-0] INFO VASSAL.launch.ModuleManager - Manager