Fatal error: Uncaught Error: Class 'WP_Translation_Controller' not found in /home/httpd/vhosts/seidenkinder.ch/httpdocs/wp-includes/l10n.php:800
Stack trace:
#0 /home/httpd/vhosts/seidenkinder.ch/httpdocs/wp-includes/load.php(1531): load_textdomain('default', '/home/httpd/vho...', 'de_DE')
#1 /home/httpd/vhosts/seidenkinder.ch/httpdocs/wp-includes/load.php(379): wp_load_translations_early()
#2 /home/httpd/vhosts/seidenkinder.ch/httpdocs/wp-settings.php(76): wp_maintenance()
#3 /home/httpd/vhosts/seidenkinder.ch/httpdocs/wp-config.php(110): require_once('/home/httpd/vho...')
#4 /home/httpd/vhosts/seidenkinder.ch/httpdocs/wp-load.php(50): require_once('/home/httpd/vho...')
#5 /home/httpd/vhosts/seidenkinder.ch/httpdocs/wp-blog-header.php(13): require_once('/home/httpd/vho...')
#6 /home/httpd/vhosts/seidenkinder.ch/httpdocs/index.php(17): require('/home/httpd/vho...')
#7 {main}
  thrown in /home/httpd/vhosts/seidenkinder.ch/httpdocs/wp-includes/l10n.php on line 800