I have all my roms on a NAS which my Nvidia Shield PRO can mount and read the rom folders. Roms can be imported with no problem, but launching the game from LaunchBox android, it will load RetroArch in a black screen. I can launch the game in RetroArch from the SMB NAS with zero problem. If I store a test rom and import from the local adoptive storage, I can launch it through LaunchBox and RetroArch just fine. Only through network from Launchbox, I received a black screen.
I have checked about the same issue . Most problem seem to relate to wrong network path, zip extraction option in the Launchbox emulator setting, or worn cores. I have check all of those probableissue on my side. Not sure what could be wrong.
Anyway, have any one have this issue? Below are my specs.
2019 NVidia Shield latest 9.1+ hotfix
Launchbox Android 1.6 + RetroArch x64 1.12
tested SNES and Sega Genesis roms both local storage (works) and over network (don't work).