Fatal error: Uncaught Error: Call to undefined function create_function() in /var/customers/webs/krull/wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php:250
Stack trace:
#0 /var/customers/webs/krull/wp-content/plugins/revslider/revslider.php(76): RevSliderFunctionsWP::registerWidget('RevSliderWidget')
#1 /var/customers/webs/krull/wp-settings.php(305): include_once('/var/customers/...')
#2 /var/customers/webs/krull/wp-config.php(115): require_once('/var/customers/...')
#3 /var/customers/webs/krull/wp-load.php(37): require_once('/var/customers/...')
#4 /var/customers/webs/krull/wp-blog-header.php(13): require_once('/var/customers/...')
#5 /var/customers/webs/krull/index.php(17): require('/var/customers/...')
#6 {main}
  thrown in /var/customers/webs/krull/wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php on line 250