Fatal error: Uncaught Error: Call to undefined function create_function() in /customers/a/4/2/grinekursus.dk/httpd.www/wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php:258
Stack trace:
#0 /customers/a/4/2/grinekursus.dk/httpd.www/wp-content/plugins/revslider/revslider.php(87): RevSliderFunctionsWP::registerWidget('RevSliderWidget')
#1 /customers/a/4/2/grinekursus.dk/httpd.www/wp-settings.php(360): include_once('/customers/a/4/...')
#2 /customers/a/4/2/grinekursus.dk/httpd.www/wp-config.php(107): require_once('/customers/a/4/...')
#3 /customers/a/4/2/grinekursus.dk/httpd.www/wp-load.php(37): require_once('/customers/a/4/...')
#4 /customers/a/4/2/grinekursus.dk/httpd.www/wp-blog-header.php(13): require_once('/customers/a/4/...')
#5 /customers/a/4/2/grinekursus.dk/httpd.www/index.php(17): require('/customers/a/4/...')
#6 {main}
  thrown in /customers/a/4/2/grinekursus.dk/httpd.www/wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php on line 258