@Kubson one of the first things to notice is you’re using extensions. We can see that based on the icon on the upper right of your browser.
This begs the question of:
Does it work if you open a private window? (if you haven’t changed settings, private window should be a session with all extensions disabled and with no cookies)
If you create a guest profile, does it work? (Hamburger menu → More Tools → Open Guest profile)
Then beyond that, I see:
Wyniki są spersonalizowane – Wypróbuj bez personalizacji
This is telling us you have personalized results. I do not know what you have chosen, but it may just be that you have narrowed things down enough that it’s not yielding results based on your choices. If you choose to Wypróbuj bez personalizacji, does it give any results or it stays like you show?
I use 2 extensions that I have added, and I routinely use Brave Browser Private Windows - and such windows do not disable extensions, because of the following setting:
This is very odd. It would make sense if you said it didn’t work in incognito but worked in guest account. But the opposite way defies logic.
Private/Incognito = New session with no cookies and all extensions disabled
Guest Profile = Creates a session with default settings, no extensions installed, and no cookies.
I guess you can further confirm just by doing a new profile. So the hamburger menu → more tools → add new profile.
But otherwise it’s just got us leaning to the idea of you perhaps clearing all cookies. This logs you out of everything but would purge out the potentially bad cookie.
It’s either that or disable all of your extensions and see if it works.