Playing on Fightcade, a popular online platform for retro fighting games.

The you are seeing (e.g., "ROM missing," "CRC check failed")

: The file is frequently used for "Palmodding," allowing players to create custom color schemes for their favorite characters. The Experience

Created by Miki_420, this mod is an extremely comprehensive hack that completely overhauls the game's visual presentation. The main feature of this hack is that it gives the entire cast default costumes and portraits that are directly reminiscent of the David Production anime adaptation. For fans of the anime, this provides a fresh and familiar coat of paint on the classic arcade sprites.

Which you are trying to use (e.g., Fightcade 2, RetroArch, FBNeo)