Notice: Use of undefined constant DB_NAME - assumed 'DB_NAME' in /home/e/eesdowpg/navl.ru/public_html/wp-includes/load.php on line 404 WordPress › Error

Can’t select database

We were able to connect to the database server (which means your username and password is okay) but not able to select the DB_NAME database.

Are you sure it exists?
Does the user eesdowpg_navl have permission to use the DB_NAME database?
On some systems the name of your database is prefixed with your username, so it would be like username_DB_NAME. Could that be the problem?

If you don’t know how to set up a database you should contact your host. If all else fails you may find help at the WordPress Support Forums.