Issue #31 · flathub/net.lutris.Lutris - Mupen64Plus error - GitHub
The filename refers to a compressed Game Boy Advance (GBA) ROM that was translated or distributed by the defunct Brazilian site Roms Português . Based on the numbering system commonly used in GBA ROM scene releases, the number 54 corresponds to the game F-Zero: Maximum Velocity . 54 (BR) (www.romsportugues.tk).gba.7z
Use a utility like 7-Zip or WinRAR to extract the .gba file from the archive. Issue #31 · flathub/net