Fatal error: Uncaught Error: Call to undefined function create_function() in /usr/www/users/africnyvap/wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php:258
Stack trace:
#0 /usr/www/users/africnyvap/wp-content/plugins/revslider/revslider.php(87): RevSliderFunctionsWP::registerWidget('RevSliderWidget')
#1 /usr/www/users/africnyvap/wp-settings.php(428): include_once('/usr/www/users/...')
#2 /usr/www/users/africnyvap/wp-config.php(89): require_once('/usr/www/users/...')
#3 /usr/www/users/africnyvap/wp-load.php(50): require_once('/usr/www/users/...')
#4 /usr/www/users/africnyvap/wp-blog-header.php(13): require_once('/usr/www/users/...')
#5 /usr/www/users/africnyvap/index.php(17): require('/usr/www/users/...')
#6 {main}
  thrown in /usr/www/users/africnyvap/wp-content/plugins/revslider/includes/framework/functions-wordpress.class.php on line 258