If you don't want to manually rebuild your files, look for romsets explicitly labeled for your version of FBNeo (e.g., "FBNeo v1.0.0.03 Full Set").
Sometimes sets are missing "parent" ROMs or "BIOS" files required for the game to boot. How to Fix "Romset is Unknown" in FBNeo romset is unknown fbneo fixed
When you see "FBNeo fixed" in community forums or file names, it usually refers to a set of ROMs that have been verified, updated, and rebuilt to match the latest driver requirements of the emulator. Understanding the "Romset is Unknown" Error If you don't want to manually rebuild your