Wordpress admin login not working in php 7.1

If you have recently changed or updated the  cPanel or your server php version from php 5.6 to php 7.1 and your wordpress/wp-admin is not loading.

You need to fix the wp-login.php in the root folder of your website.

Login via FTP to your website open the file wp-login.php

Find the line

                $user = wp_signon( '', $secure_cookie );   ~around line 806

Replace it with

                $user = wp_signon( array(), $secure_cookie );