Can't login to phpMyAdmin on subdomain (no error message)

First of all, I am aware of all the questions here on SO with very similar titles, but none of the solutions described there worked for me.

My case is a little bit more specific than those questions. I have a domain name pointing to my own server (Ubuntu 17.04, Apache 2.4). On the server, there is a freshly installed instance of phpMyAdmin. When I'm accessing phpMyAdmin's site using domain.com/phpmyadmin it works fine, and I can log in.

What I am trying to achieve is to access phpMyAdmin from a subdomain (ex. php.domain.com). I have the virtual host set up and when I try to access the site, the login page is working just fine, but when I enter my username and password, nothing happens (as opposed to the domain.com/phpmyadmin method, which works just fine), not even an error message.

What I have tried:

Verify that session.save_path is valid and writeable
Reinstall phpMyAdmin and MySQL

The following is the apache virtual host config file for the subdomain

<VirtualHost *:80>
    ServerName php.domain.com
    DocumentRoot "/usr/share/phpmyadmin"
    <Directory "/usr/share/phpmyadmin">
        allow from all
        Options None
        Require all granted
    </Directory>
    # RewriteEngine on
    # RewriteCond %{SERVER_NAME} =php.domain.com
    # RewriteRule ^ http://%{SERVER_NAME}%{REQUEST_URI} [END,QSA,R=permanent]
</VirtualHost>

Why is it that I can't login from the subdomain, but I can from domain.com/phpmyadmin and what shoud I do to make it work?

Solution

Apparently all I had to do was delete the cookies in Chrome.