It works after having deleted all gamelist file...

some other error log found on es folder

es_launch_stdout.log
Powering on HDMI with explicit settings (CEA mode 4)
Powering on HDMI with preferred settings
/usr/bin/retroarch -L /usr/lib/libretro/fbalpha_libretro.so --config /recalbox/share/system/configs/retroarch/retroarchcustom.cfg /recalbox/share/roms/fba_libretro/gunbird2.zip
running command: /usr/bin/retroarch -L /usr/lib/libretro/fbalpha_libretro.so --config /recalbox/share/system/configs/retroarch/retroarchcustom.cfg /recalbox/share/roms/fba_libretro/gunbird2.zip
mkdir(/recalbox/share_init/cheats/cht/FB Alpha/) error: Read-only file system.
Failed to create directory: "/recalbox/share_init/cheats/cht/FB Alpha/".
mkdir(/recalbox/share_init/cheats/cht/FB Alpha/) error: Read-only file system.
Failed to create directory: "/recalbox/share_init/cheats/cht/FB Alpha/".

and in es_launch_stderr.log
ALSA lib seq_hw.c:466:(snd_seq_hw_open) open /dev/snd/seq failed: No such file or directory

Would that means something for you ?