Polylang-Logo doesn’t change

Hey guys!

This is my first time creating a website so please have some patience:-P

I managed to configure Polylang and,for now, it’s working fine. The only bug is that it doesn’t load different logo for different language versions. Ie. it always loads logo in English ,both on Croatian and English site although I’ve created and uploaded two different logos(in Zerif’s customize menu,where I specifically marked which logo is for which page)
Looking at similar issues and related posts, people had to add a piece of code but I have no idea how to do that.
Please help me out to fix this!

The page I need help with: [log in to see the link]