localhost / can’t connect

I build and test everything new on a personal server and gone through errors like that before.

But what specifically is the problem?

well, the main problem is this WordPress message: https://www.kulsdom.com/wordpress/wordpresserror.gif

…
all explained in the first link.

I am still having this problem too, is there anyone can tell me how to fix it? Thanks.

If you are on 10.4.4 you might have run into this:
https://www.ads-software.com/support/topic/55902
Also, I remember running into some problems setting up and connecting to mysql and did
mysql> SELECT Host, User, Password FROM mysql.user
-> WHERE LENGTH(Password) > 16; and set the password again as outlined here, which seemed to work.
https://dev.mysql.com/doc/refman/5.0/en/old-client.html

Okay, problem solved, thanks to a friend who found this article.
https://www.billstevenson.org/news/2005/05/phpmyadmin.html
(done with PhpMyAdmin)