Error establishing a database connection

Check your wp-config.php file if you have correct DB name, DB User, DB password and DB host.

and as I go to this zone Setup

When you say you changed the password where did you change the password?

yes a change the password

changed password yesterday within the admin word press, on the part of users

Thanks Krishna for your link, i browser now in my site..thanks

Glad to know that you could solve the issue.

but now I have another problem. I enter the home site and then other pages do not let me enter, me error 404

Can you post your site URL?

ok

https://www.xportrecords.com

Clear your browser cache and see. I do not find 404 errors on the links I checked.