God I hope someone can help me, I really tried for 2 days.
My setup is a generic PC (AMD) with a fresh install of LibreElec 9.2, Gamestarter 3.0 (for RetroArch) and IAGL.
I loaded RetroArch with the corresponding emulator used in IAGL. In IAGL settings, I've set the System Type to Gamestarter Addon, the RetroArch System Folder to "storage/.kodi/addons/game.retroarch". Now when I load a rom, it just crashes back to Kodi, whyyyyyy??
So sorry, I Just noticed it actually works for N64 games. It just doesn't work for NES ones. Is that weird? I was using FCEU, I thought it was kinda the best for NES.