Not working search fields and polylang translate problem

Dear Sir,
I have two website.
Let’s call them ‘A’ and ‘B’.
A: https://suncitypr.hu/pets/
B: https://lichtfurfelnassen.hu/de/unsere-hunde/

On website ‘A’ I use Divi template, polylang for multilanguage and the Pets plugin.
On website ‘B’ I use Divi template, polylang for multilanguage and the Pets plugin.
Both website is at the same webhosting.

I have two problems:
1. At website ‘B’ I can’t able translate the Pets plugin texts. If is go to the String translation menu the Pets plugin isn’t in the list and I can’t filter to Pets, because that group is also missing. On website ‘A’ It works perfectly. As you can see I translate the “Breed” phrase to “Fajta” (Hungarian translation)

2.On website ‘B’ the Pets search bar doesn’t work. I properly created breeds and colors and created dogs. If I try to search for example Boxer dogs the sarch engine doesn’t filter the dogs. The page refreshes but all the dogs are in the list, so it’s not filtered. On website ‘A’ the sog searching works perfectly. I don’t understand why because I created the breeds, colors and the dogs at the same way as in case of website B.

I tried to remove and reinstall the Pets plugin, but not helped.
I try to find any log file of Pets plugin, bot didn’t find.
I hope you have some idea what causes my very annoying problem.

If you need any further information don’t hesitate to ask me and I will let you know.

Thank you,
Tamas Baranyi

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