The sound engine encountered a file-related error when accessing the media source file. In general, this error is preceded by a "file not found" or "file permission" error above this error line in the log. That error contains the specific file and path that was used to start playing this sound.
詳細は 「File ... not found in path(s): ...」 と 「File ... could not be opened due to permissions, access rights or conflicting open modes. (Found in path(s): ...).」 を参照してください。