Symmetrical template.

Thank you for automating the installation process! However, I couldn't create a symmetrical map using the h3dm1 template on the hot-site. It says, "It is impossible to create a random map that meets the specified requirements." I followed all the instructions, only checked h3dm1 in the WOG options, enabled the symmetrical template in the VoG options, and enabled the replacement of one-sided monoliths with two-sided ones. I set 8 players, no water, strong monsters, 160%. However, I couldn't find anything about map sizes in the instructions, so I experimented with different sizes, but nothing worked. I used identical castles and also tried random ones. What could be the problem?