Wordpress Multisite “Error establishing a database connection” in localhost

Question

When attempting to convert WordPress to a Multisite setup, I get the error:

Error establishing a database connection

I\'m using

Answer 1

You need to add to your wp-config.php:

define('MULTISITE', true);

I had the same problem. I skipped this line because I already had define('WP_ALLOW_MULTISITE', true); in my wp-config and it looked to me the same.