In my case the problem were cookies. Now I use only Cookie Notice & Compliance for GDPR / CCPA plugin and I added to .htaccess this short code:
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault A0
ExpiresByType text/javascript A0
ExpiresByType application/javascript A0
ExpiresByType text/css A604800
ExpiresByType image/gif A604800
ExpiresByType image/png A604800
ExpiresByType image/jpeg A604800
ExpiresByType image/x-icon A604800
ExpiresByType text/html A0
</IfModule>
I was happy as a small kid few months ago when I applied trick with htaccess and it worked. But now I am on the same boat as the others, solution is not working anymore.
Main question is why WP opened this forum when nobody cares about it? I am not demandig user but the basic function as protected page has to be reliable and when is any error with it, it must be solved quickly, in weeks. This is one year old.
I am not sure but it seems WP was bad choice.
Oh, thanks you bahka! It works for me (tested in chrome, opera, edge).
