Fatal error: Uncaught Error: Call to undefined function create_function() in /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-includes/pomo/translations.php:208
Stack trace:
#0 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-includes/pomo/translations.php(269): Gettext_Translations->make_plural_form_function(2, '$n != 1')
#1 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-includes/pomo/translations.php(69): Gettext_Translations->set_header('Plural-Forms', 'nplurals=2; plu...')
#2 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-includes/pomo/mo.php(248): Translations->set_headers(Array)
#3 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-includes/pomo/mo.php(27): MO->import_from_reader(Object(POMO_FileReader))
#4 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-includes/l10n.php(559): MO->import_from_file('/var/www/vhosts...')
#5 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-includes/l10n.php(688): load_textdomain('duplicate-post', '/var/www/vhosts...')
#6 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-content/plugins/duplicate-post/duplicate-post.php(38): load_plugin_textdomain('duplicate-post', 'wp-content/plug...', 'duplicate-post/...')
#7 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-settings.php(255): include_once('/var/www/vhosts...')
#8 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-config.php(115): require_once('/var/www/vhosts...')
#9 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-load.php(37): require_once('/var/www/vhosts...')
#10 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-blog-header.php(13): require_once('/var/www/vhosts...')
#11 /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/index.php(17): require('/var/www/vhosts...')
#12 {main}
thrown in /var/www/vhosts/ljqokyzk.host227.checkdomain.de/htdocs/wp-includes/pomo/translations.php on line 208