( ! ) Warning: mysqli_real_connect(): (HY000/2002): Connection refused in /home/rzi-sfo/public_html/wp-includes/class-wpdb.php on line 2019
Call Stack
#	Time	Memory	Function	Location
1	0.0001	360048	{main}( )	.../index.php:0
2	0.0001	360328	require( '/home/rzi-sfo/public_html/wp-blog-header.php )	.../index.php:17
3	0.0002	360712	require_once( '/home/rzi-sfo/public_html/wp-load.php )	.../wp-blog-header.php:13
4	0.0002	361408	require_once( '/home/rzi-sfo/public_html/wp-config.php )	.../wp-load.php:50
5	0.0003	362816	require_once( '/home/rzi-sfo/public_html/wp-settings.php )	.../wp-config.php:78
6	0.0020	588624	require_wp_db( )	.../wp-settings.php:124
7	0.0021	590424	wpdb->__construct( $dbuser = 'rzi-sfo', $dbpassword = 'P@$$1234', $dbname = 'rzi_sfo', $dbhost = 'localhost' )	.../load.php:582
8	0.0021	590424	wpdb->db_connect( $allow_bail = ??? )	.../class-wpdb.php:773
9	0.0022	591304	mysqli_real_connect( $link = class mysqli { public $client_info = 'mysqlnd 7.4.16'; public $client_version = 70416; public $connect_errno = 2002; public $connect_error = 'Connection refused'; public $errno = 2002; public $error = 'Connection refused' }, $host = 'localhost', $user = 'rzi-sfo', $password = 'P@$$1234', $database = NULL, $port = NULL, $socket = NULL, $flags = 0 )	.../class-wpdb.php:2019

( ! ) Warning: mysqli_real_connect(): (HY000/2002): Connection refused in /home/rzi-sfo/public_html/wp-includes/class-wpdb.php on line 2019

Call Stack

Time

Memory

Function

Location

0.0001

360048

{main}( )

.../index.php:0

0.0001

360328

require( '/home/rzi-sfo/public_html/wp-blog-header.php )

.../index.php:17

0.0002

360712

require_once( '/home/rzi-sfo/public_html/wp-load.php )

.../wp-blog-header.php:13

0.0002

361408

require_once( '/home/rzi-sfo/public_html/wp-config.php )

.../wp-load.php:50

0.0003

362816

require_once( '/home/rzi-sfo/public_html/wp-settings.php )

.../wp-config.php:78

0.0020

588624

require_wp_db( )

.../wp-settings.php:124

0.0021

590424

wpdb->__construct( $dbuser = 'rzi-sfo', $dbpassword = 'P@$$1234', $dbname = 'rzi_sfo', $dbhost = 'localhost' )

.../load.php:582

0.0021

590424

wpdb->db_connect( $allow_bail = ??? )

.../class-wpdb.php:773

0.0022

591304

mysqli_real_connect( $link = class mysqli { public $client_info = 'mysqlnd 7.4.16'; public $client_version = 70416; public $connect_errno = 2002; public $connect_error = 'Connection refused'; public $errno = 2002; public $error = 'Connection refused' }, $host = 'localhost', $user = 'rzi-sfo', $password = 'P@$$1234', $database = NULL, $port = NULL, $socket = NULL, $flags = 0 )

.../class-wpdb.php:2019

Connection refused

Error establishing a database connection

This either means that the username and password information in your wp-config.php file is incorrect or that contact with the database server at localhost could not be established. This could mean your host’s database server is down.

Are you sure you have the correct username and password?
Are you sure you have typed the correct hostname?
Are you sure the database server is running?

If you are unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress support forums.