Root chunk is ???? and not form

[anactest23-source]

Describe the bug

Recently I decided to try and see the files of a game called "SM4J OB" but in the latest version from 3 years ago, an error appears saying "root chunk is ???? and not form" help much appreciated!

Reproducing steps

Setup Details

1. Latest release 0.9.0.0.0
2. Windows 11
3. SM4J Online Battle ( https://carlosxdjavgames.altervista.org/archivos/199 )

[BioTomateDE]

i looked at the data.win; the chunk names have been erased somehow.

if you download the game for windows, does it function properly when you run SM4J Online Battle.exe? does it crash?

i get a crash "Unhandled page fault on read access to F54B8CA4 at address 0047B630", which makes sense for this malformed data file.

i do wonder how this issue even ocurred though...

[anactest23-source]

It doesn't crash, from what I heard they added some sort of anti decompiler due to some hacking and cheating so that might help understanding the issue