Getting another error when extracting DZ file

[AdelQraft]

When I try to extract the DZ file, I am getting this error:

undz.py -f /root/Desktop/LG/H81220x00.dz -x [!] Error: CRC32 of data doesn't match header (25A252F4 vs 00000000)

The KDZ file is H81220x_00_0712.kdz (6.0 Marshmallow) from the LG G4 H812.
The extraction of the DZ file worked perfectly with other tools, like DZFileTools.py from IOMonster or LG Firmware Extract.

Thanks.