Fatal error: Uncaught Error: Call to undefined function wp_installing() in /var/www/clients/client1/web3/web/wp-includes/option.php:620
Stack trace:
#0 /var/www/clients/client1/web3/web/wp-includes/functions.php(1287): wp_load_alloptions()
#1 /var/www/clients/client1/web3/web/wp-includes/load.php(472): is_blog_installed()
#2 /var/www/clients/client1/web3/web/wp-settings.php(109): wp_not_installed()
#3 /var/www/clients/client1/web3/web/wp-config.php(82): require_once('/var/www/client...')
#4 /var/www/clients/client1/web3/web/wp-load.php(37): require_once('/var/www/client...')
#5 /var/www/clients/client1/web3/web/wp-blog-header.php(25): require_once('/var/www/client...')
#6 /var/www/clients/client1/web3/web/index.php(12): require('/var/www/client...')
#7 {main}
thrown in /var/www/clients/client1/web3/web/wp-includes/option.php on line 620