Modding

Hello.
Could you tell me how to fix this bug in HOMM5 TOTE (this is what my naval battle scene looks like)?
https://content.foto.my.mail.ru/mail/leoneck/phot/h-427.jpg
(I would insert it into IMG tags, but I don't see a spoiler tag to hide the image under it)
Or at least, what and where to look for (i.e., for example, it is most likely an overlay, and you need to look for 2 files with the same name somewhere, or it is probably that the texture name is incorrectly written in some file, etc.)?