( ! ) 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	221672	{main}( )	.../index.php:0
2	0.0002	230064	require( '/home/users/1/shelley-takagi/web/wp-blog-header.php' )	.../index.php:5
3	0.0003	235976	require_once( '/home/users/1/shelley-takagi/web/wp-config.php' )	.../wp-blog-header.php:17
4	0.0008	330856	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	221672	{main}( )	.../index.php:0
2	0.0002	230064	require( '/home/users/1/shelley-takagi/web/wp-blog-header.php' )	.../index.php:5
3	0.0003	235976	require_once( '/home/users/1/shelley-takagi/web/wp-config.php' )	.../wp-blog-header.php:17
4	0.0008	330856	require_once( '/home/users/1/shelley-takagi/web/wp-settings.php' )	.../wp-config.php:25
5	0.0013	405720	require_once( '/home/users/1/shelley-takagi/web/wp-includes/wp-db.php' )	.../wp-settings.php:100
6	0.0014	406400	wpdb->__construct( )	.../wp-db.php:390
7	0.0025	410392	wpdb->bail( )	.../wp-db.php:72
8	0.0025	410488	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.