Fatal error: Uncaught Error: Call to undefined function create_function() in /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-content/plugins/post-notif/includes/class-post-notif-widget.php:276
Stack trace:
#0 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-content/plugins/post-notif/includes/class-post-notif.php(129): require_once()
#1 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-content/plugins/post-notif/includes/class-post-notif.php(74): Post_Notif->load_dependencies()
#2 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-content/plugins/post-notif/post-notif.php(81): Post_Notif->__construct()
#3 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-content/plugins/post-notif/post-notif.php(85): run_post_notif()
#4 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-settings.php(305): include_once('/customers/c/a/...')
#5 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-config.php(115): require_once('/customers/c/a/...')
#6 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-load.php(37): require_once('/customers/c/a/...')
#7 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-blog-header.php(13): require_once('/customers/c/a/...')
#8 /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/index.php(17): require('/customers/c/a/...')
#9 {main}
  thrown in /customers/c/a/d/autonomes-seminar-hu-berlin.org/httpd.www/wp-content/plugins/post-notif/includes/class-post-notif-widget.php on line 276