Modding

Need help. I decided to add Saretha from the Dark Messiah bonus scenario to maps created in the map generator using the UnlockAll Heroes mod. Before that, I added Temirkhan and the ghost knight, and everything worked. I extracted the file with the scenario map, made it a folder, uploaded it to the root data folder, and extended the character's paths to the required ones in the xdb file. At first, everything started up, and the character could be selected when loading the map; he was generated in taverns. After that, I launched the bonus scenario through its executable file, and after that, the hero model disappeared from the adventure map and the hero window in other scenarios, leaving only the skirt. All icons with the character's portraits are in place. I don't have enough knowledge to fix this. I'm asking for help.

Added after 6 hours and 31 minutes
I downloaded the scenario in h5m format. It opens in the editor, and Saretha's model is displayed, but I can't figure out what to do with it yet.