( ! ) Strict standards: Redefining already defined constructor for class wpdb in /home/users/1/shelley-takagi/web/wp-includes/wp-db.php on line 52
Call Stack
#	Time	Memory	Function	Location
1	0.0001	221880	{main}( )	.../index.php:0
2	0.0002	230272	require( '/home/users/1/shelley-takagi/web/wp-blog-header.php' )	.../index.php:5
3	0.0003	236184	require_once( '/home/users/1/shelley-takagi/web/wp-config.php' )	.../wp-blog-header.php:17
4	0.0008	331064	require_once( '/home/users/1/shelley-takagi/web/wp-settings.php' )	.../wp-config.php:25

( ! ) Warning: Cannot modify header information - headers already sent by (output started at /home/users/1/shelley-takagi/web/wp-includes/wp-db.php:52) in /home/users/1/shelley-takagi/web/wp-includes/wp-db.php on line 373
Call Stack
#	Time	Memory	Function	Location
1	0.0001	221880	{main}( )	.../index.php:0
2	0.0002	230272	require( '/home/users/1/shelley-takagi/web/wp-blog-header.php' )	.../index.php:5
3	0.0003	236184	require_once( '/home/users/1/shelley-takagi/web/wp-config.php' )	.../wp-blog-header.php:17
4	0.0008	331064	require_once( '/home/users/1/shelley-takagi/web/wp-settings.php' )	.../wp-config.php:25
5	0.0014	405960	require_once( '/home/users/1/shelley-takagi/web/wp-includes/wp-db.php' )	.../wp-settings.php:100
6	0.0014	406664	wpdb->__construct( )	.../wp-db.php:390
7	0.0027	410656	wpdb->bail( )	.../wp-db.php:72
8	0.0027	410752	header ( )	.../wp-db.php:373

Error establishing a database connection

This either means that the username and password information in your wp-config.php file is incorrect or we can't contact the database server at mysql8.heteml.jp. This could mean your host's database server is down.

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

If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress Support Forums.