Search function stopped working after activating Polylang.

Hello!

I installed polylang some time ago and made a bilingual version of the website. I’m using a customised WP theme, and their support couldn’t help me with this issue and sent to this forum.

When polylang is active, search doesn’t work, returning (content isn’t here) for both of the languages versions.

I’ve read this thread https://www.ads-software.com/support/topic/wordpress-search-stop-working-after-activating-polylang?replies=9 , but seems to be that my issue is different.
I deactivated all other plugins, but this error stays the same.

I’m a beginner, so not really familiar with coding, this is the link to the site https://balistyle.villas
Search qery:
stype=research&s=re&paged=1&captcha&estate_type=9&estate_kind=-1&estate_country=-1&estate_city=-1&pricemin&pricemax&rooms&bathrooms&bedrooms

Please kindly advise, what could be the problem and how could I possibly get it fixed? Any advice would be much appreciated

https://www.ads-software.com/plugins/polylang/