What an interesting bug; I haven't seen anything like this before. I'll take a look and see what can be done.
I have one idea: the map is packed in a WinRAR archive, and this archive has an unfortunate feature of corrupting files. For example, one of the RTF updates was packaged in WinRAR, and I received many messages about bugs – here there’s no texture, there the model disappeared, here the mod doesn’t work. Try unpacking the map using 7-Zip; it might help. Well, I'm off to hunt for the bug now).
Added after 1 minute
Attachment 67299
How can I fix the problem with units? The Forest faction units don't changethe hero and city change to Naga, but the units don't.
the hero and city change to Naga, but the units don't.