None of my wordpress link open, every links shows a blank white screen/page

Hi Community,
This would be my last resort. I tried everything to resolve this issue.

One of my website is not working, I removed all the plugins, all the themes, one at a time and all at a time, but nothing worked.
I re-installed, manually installed, used the latest wp-version, imported the DB that had all the site content and stuff…but still the problem continues.

No matter what link I try to open it just shows a blank screen.
According to my cousin (it is his site) it started a few weeks back suddenly, he was working on some post content and left it, later he checked and it went blank.

Now, none of the links work, no matter what link you open you get a white blank screen.

This is the website
https://depurazioneroma.info/

The only link that shows something is the
https://depurazioneroma.info/wp-login.php

But, it doesn’t go beyond that, even if I give the right username and password, it still shows the same page after trying logging in.

I even changed the password from phpMyAdmin, but with same results.

I already tried to import the SQL DB for this wbsite and imported to a fresh new installation on a different domain, but the result is still blank pages.

Please help….