Once everything has been detected correctly and the license activated for your installation domain, press “Next” and proceed to database configuration. Add in your database connection on this page and proceed to “Next” page.
if you receive either of Access denied for user, Connection Fail To Database after pressing “NEXT” during database configuration then you might have old database access information already added in /db/db.cnf.php file. Which makes a conflict with database connection. Make sure your db.cnf.php file is in its original state during installation and you are not adding wrong database information (user, pass, name)