Fatal error: Uncaught Error: Call to undefined function create_function() in /customers/d/d/d/keithknight.nl/httpd.www/wp-content/plugins/wp-simple-booking-calendar/library/WpSimpleBookingCalendar.php:34
Stack trace:
#0 /customers/d/d/d/keithknight.nl/httpd.www/wp-content/plugins/wp-simple-booking-calendar/wp-simple-booking-calendar.php(45): WpSimpleBookingCalendar::init()
#1 /customers/d/d/d/keithknight.nl/httpd.www/wp-settings.php(254): include_once('/customers/d/d/...')
#2 /customers/d/d/d/keithknight.nl/httpd.www/wp-config.php(96): require_once('/customers/d/d/...')
#3 /customers/d/d/d/keithknight.nl/httpd.www/wp-load.php(37): require_once('/customers/d/d/...')
#4 /customers/d/d/d/keithknight.nl/httpd.www/wp-blog-header.php(12): require_once('/customers/d/d/...')
#5 /customers/d/d/d/keithknight.nl/httpd.www/index.php(17): require('/customers/d/d/...')
#6 {main}
  thrown in /customers/d/d/d/keithknight.nl/httpd.www/wp-content/plugins/wp-simple-booking-calendar/library/WpSimpleBookingCalendar.php on line 34