Cannot Login, error msg shows "To log in to this site, your browser must accept cookies from the domain"

On my dev environment hosted on the cloud which has SSL, I added this to the settings.php

$secure = true; // if you only want to receive the cookie over HTTPS
$httponly = true; // prevent JavaScript access to session cookie
$samesite = 'none';

if(PHP_VERSION_ID < 70300) {
  session_set_cookie_params($maxlifetime, '/; samesite='.$samesite, $_SERVER['HTTP_HOST'], $secure, $httponly);
} else {
  session_set_cookie_params([
    'lifetime' => $maxlifetime,
    'path' => '/',
    'domain' => $_SERVER['HTTP_HOST'],
    'secure' => $secure,
    'httponly' => $httponly,
    'samesite' => $samesite
  ]);
}

My goal was to set SESSION cookie to samesite = 'NONE'.

Login was working when I did this on Drupal 8, but now on Drupal Core 9.3.0, when I login I get error message "To log in to this site, your browser must accept cookies from the domain [domain_name]"

You get this error message when Drupal expects there to be a session, communicated by the check_logged_in, but none can be found.

I've found myself in this situation myself when a miss-configured web server stripped the cookies from the request.

The leads to Drupal setting up the session, and adding the query parameters, but the cookie not being present in subsequent requests. Drupal then displays the

your browser must accept cookies

message.

Likely the cookie settings you are adding cause the cookie to become invalidated somehow, so double check that the browser actually sends the cookies, and that they reach Drupal.