Move your firmware file and the Flash Tool folder directly to the root of your drive (e.g., C:\Realme\ ).
While this error seems file-related, a handshake failure between the PC and the phone can sometimes trigger misleading errors in the UI. cannot find central directory realme flash tool fixed
Older versions of the Realme Flash Tool (like v1.0) may not recognize the central directory structure of newer Android 13 or 14-based firmware. Move your firmware file and the Flash Tool