MySQL said:
Cannot connect: invalid settings.
phpMyAdmin tried to connect to the MySQL server, and the server rejected the
connection. You should check the host, username and password in your
configuration and make sure that they correspond to the information given
by the administrator of the MySQL server.

$cfg['Servers'][$i]['password'] = ''; to $cfg['Servers'][$i]['password']  = 'yourPassHere';

UPDATE user SET Password=PASSWORD('newpwd') WHERE User='root';
flush privileges;
exit;

$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = 'password'; // which is default setting in xampp server