First of all awesome initiative!
I have installed the add-on on latest LibreELEC Kodi 17.0 testbuild #0524, 24-May-2016 (LibreELEC Testbuilds for RaspberryPi (Kodi 17.0)).
Installation went okay, only needed to enable AdvancedLauncer post-installation.
So I copied the MSX bios files into the emulators/bios folder and some MSX 1 ROMs into emulators/roms/msx folder. Then started the RetroArch frontend... screen went blank and poof... back to starting the Kodi interface. Also tried EmulationStation frontend, which started okay. Emulationstation found the MSX games but refused to start any game.
Also tried some SNES games (put into emulators/roms/snes). Same results as for MSX games.
Next tried AdvancedLauncer. Went to MSX entry, added the items (found the games!). Starting the MSX entry raised the error "Advanced Launcer - Error. Target category not found". Then tried SNES entry, added the items (found the games!). Same error message.
Any pointers? Should it work at all on these cutting edge LibreELEC Kodi 17.0 testbuilds?