Warning: Cannot modify header information….again

I feel like I have tried every thing that every post has said about this issue and it still doesn’t work.

Here is the error:

Warning: Cannot modify header information – headers already sent by (output started at /home/xxx/public_html/sunshinecoastskipbags.com.au/wp-config.php:1) in /home/xxx/public_html/sunshinecoastskipbags.com.au/wp-includes/ms-settings.php on line 183

I have removed all blank (whitespace) from the wp_config.php file and it still doesn’t work. I am at a lose.

Here is my wp-config.php file.

<?php
/**
 * The base configuration for WordPress
 *
 * The wp-config.php creation script uses this file during the
 * installation. You don't have to use the web site, you can
 * copy this file to "wp-config.php" and fill in the values.
 *
 * This file contains the following configurations:
 *
 * * MySQL settings
 * * Secret keys
 * * Database table prefix
 * * ABSPATH
 *
 * @link https://codex.wordpress.org/Editing_wp-config.php
 *
 * @package WordPress
 */
// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define('DB_NAME', 'redacted');
/** MySQL database username */
define('DB_USER', 'redacted');
/** MySQL database password */
define('DB_PASSWORD', 'redacted');
/** MySQL hostname */
define('DB_HOST', 'localhost');
/** Database Charset to use in creating database tables. */
define('DB_CHARSET', 'utf8');
/** The Database Collate type. Don't change this if in doubt. */
define('DB_COLLATE', '');
/**#@+
 * Authentication Unique Keys and Salts.
 *
 * Change these to different unique phrases!
 * You can generate these using the {@link https://api.wordpress.org/secret-key/1.1/salt/ WordPress.org secret-key service}
 * You can change these at any point in time to invalidate all existing cookies. This will force all users to have to log in again.
 *
 * @since 2.6.0
 */
define('AUTH_KEY',         'kh2nxOd6lvDu7eNU2WIJiyBJU4c1TjosIQBQiuuTZVHfeYp6mX1HVI67BOusAKFQ');
define('SECURE_AUTH_KEY',  'LVWxN68E56YsgmriTAG9hG6Vc3zVNUZkvXTTjp20tSy2ofreCpXBeVk8OwyEaAbl');
define('LOGGED_IN_KEY',    'hr4UIqkTqUz1saBk1Cp08B76cmGQIypJsORppgMuJUr5qDQJXUviswMOtpBHlDZT');
define('NONCE_KEY',        'Kr2ZHHvEFHerJO3OcEf6YC19AL33FZJWBF9KjLAWcF4BHwtGiS9BJ4ybxbReXBIt');
define('AUTH_SALT',        'zaWdbV0LCuGevC6HBHJpMgdgxa8oWIU0IuiPa0rSpV8In9WNO56Muf6e2ye7gBsz');
define('SECURE_AUTH_SALT', 'T2bVhMny42KZiyGJsgblbNtEGV2rVOSo8HlqOCtM0TZ5LDrdt1jb2YEPmySr8eSc');
define('LOGGED_IN_SALT',   'unhY5hkXkl2EIFipbeSM9U8Yuj0nS7qNIvDYxzsDdSvYeKgjgORJHkKPcMXnPSu6');
define('NONCE_SALT',       'puromGKo2osidUiCnWmL2EifMueqDkRtDcuatRmg8natCMrXlEfMiwUL6gWEplUk');
/**
 * Other customizations.
 */
define('FS_METHOD','direct');define('FS_CHMOD_DIR',0755);define('FS_CHMOD_FILE',0644);
define('WP_TEMP_DIR',dirname(__FILE__).'/wp-content/uploads');
/**
 * Turn off automatic updates since these are managed upstream.
 */
define('AUTOMATIC_UPDATER_DISABLED', true);
/**
 * Multi-site
 *
 */
define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', false);
$base = '/';
define('DOMAIN_CURRENT_SITE', 'sunshinecoastskipbags.com.au');
define('PATH_CURRENT_SITE', '/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);
define('WP_ALLOW_MULTISITE', true);
/**#@-*/
/**
 * WordPress Database Table prefix.
 *
 * You can have multiple installations in one database if you give each
 * a unique prefix. Only numbers, letters, and underscores please!
 */
$table_prefix  = 'wp_';
/**
 * For developers: WordPress debugging mode.
 *
 * Change this to true to enable the display of notices during development.
 * It is strongly recommended that plugin and theme developers use WP_DEBUG
 * in their development environments.
 *
 * For information on other constants that can be used for debugging,
 * visit the Codex.
 *
 * @link https://codex.wordpress.org/Debugging_in_WordPress
 */
define('WP_DEBUG', false);
/* That's all, stop editing! Happy blogging. */
/** Absolute path to the WordPress directory. */
if ( !defined('ABSPATH') )
	define('ABSPATH', dirname(__FILE__) . '/');
/** Sets up WordPress vars and included files. */
require_once(ABSPATH . 'wp-settings.php');

Line 183 of ms_settings.php is

header( 'Location: ' . $destination );

There is no whitespace in that file either.

Not sure what to do. Cannot find a solution.

Thanks for any help in advance.