Fatal error: Uncaught Error: Class 'WP_Hook' not found in /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/plugin.php:111 Stack trace: #0 /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/wp-db.php(2047): add_filter('query', Array, 0) #1 /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/wp-db.php(2066): wpdb->placeholder_escape() #2 /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/wp-db.php(1187): wpdb->add_placeholder_escape('utf8mb4') #3 /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/wp-db.php(1258): wpdb->_real_escape('utf8mb4') #4 [internal function]: wpdb->escape_by_ref('utf8mb4', 0) #5 /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/wp-db.php(1378): array_walk(Array, Array) #6 /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/wp-db.php(810): wpdb->prepare('SET NAMES '%s'', Array) #7 /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/wp-db.php(1689): wpdb->set_charset(Object(mysqli)) #8 /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/wp-db.php(639): wpdb->db_connect() #9 /var/www/vhosts/vlah in /var/www/vhosts/vlahosfotis.gr/httpdocs/wp-includes/plugin.php on line 111