Hm, the only other error that gets logged is that it can't access the Motif LAF, which is a UI thing and thus hardly relevant to saving files. But it makes me wonder if you're just running the bare .jar file, i.e. without going through the .sh/.bat startup scripts?
Yeah when GNOME 3 killed the system tray, I fist messed with a compatibility layer and then simply gave up. But maybe it will work for you on Cinnamon - check out the latest dev build, I added (basic) tray icon support: Preferences -> General -> Tray icon (needs a restart). The option will disappear if your system reports not supporting SystemTray.
minimise/maximise to/from system tray?
Yeah when GNOME 3 killed the system tray, I fist messed with a compatibility layer and then simply gave up. But maybe it will work for you on Cinnamon - check out the latest dev build, I added (basic) tray icon support: Preferences -> General -> Tray icon (needs a restart). The option will disappear then your system reports not supporting SystemTray.
add basic tray icon functionality
I can only reproduce this by calling the plugin on a device that has no address (such as a switch), so it's undefined an thus inevitably fails... otherwise it works fine as far as I can tell. And Mint has gnome-terminal, at least the default Cinnamon desktop does, I just checked.
bump dependencies where possible and eliminate the Helvetica font warning
fix interface panel port scanner hookup