Root directory redirect not working

https://collab.solutions/cosolutions (works)
https://collab.solutions (Error establishing a database connection)
Updated from single site to multisite subfolders.

Setup of single site with index.php in root that redirects to httpdocs/cosolutions (wordpress folder):

httpdocs/index.php

<?php
/**
 * Front to the WordPress application. This file doesn't do anything, but loads
 * wp-blog-header.php which does and tells WordPress to load the theme.
 *
 * @package WordPress
 */

/**
 * Tells WordPress to load the WordPress theme and output it.
 *
 * @var bool
 */
define('WP_USE_THEMES', true);

/** Loads the WordPress Environment and Template */
require(dirname( __FILE__ ) . '/cosolutions/wp-blog-header.php');
?>

This does not redirect to /cosolutions/wp-blog-header.php

Network settings
Siteurl https://collab.solutions/cosolutions
Home https://collab.solutions/cosolutions
Note if I change either of these everything stops working

Any Advice will be appreciated.

Thank you