Did you change the database connection information in includes/settings.php? Because it seems like you are trying to connect with my connection settings. Simply change in includes/settings.php
define("MYSQL_HOST", "localhost:3307");
define("MYSQL_USER", "root");
define("MYSQL_PASSWORD", "123456");
define("MYSQL_DBNAME", "redux");
define("MYSQL_HOST", "localhost:3307");
define("MYSQL_USER", "root");
define("MYSQL_PASSWORD", "123456");
define("MYSQL_DBNAME", "redux");