Fatal error: Uncaught Error: Class "wpdb" not found in load.php

[danlelbachhuber]

Hello, after updated php version in WordPress, i can't show admin login and errors are:

Fatal error: Uncaught Error: Class "wpdb" not found in
/home/mhd-01/www.xxxxxxxx.it/htdocs/wp-includes/load.php:428 Stack trace: #0
/home/mhd-01/www.xxxxxxxx.it/htdocs/wp-settings.php(120): require_wp_db() #1
/home/mhd-01/www.xxxxxxxx.it/htdocs/wp-config.php(98): require_once('...') #2
/home/mhd-01/www.xxxxxxxx.it/htdocs/wp-load.php(37): require_once('...') #3
/home/mhd-01/www.xxxxxxxx.it/htdocs/wp-admin/admin.php(34): require_once('...') #4
/home/mhd-01/www.xxxxxxxx.it/htdocs/wp-admin/index.php(10): require_once('...') #5
{main} thrown in /home/mhd-01/www.xxxxxxxx.it/htdocs/wp-includes/load.php on line 428

Is there any ideas about can i resolve this? Thanks.

I would login and not show any errors in my site on WordPress.