Fatal error: Uncaught Error: Call to undefined function create_function() in /home/.sites/719/site3247378/web/campus-we/wp-includes/class-wp-hook.php:586
Stack trace:
#0 /home/.sites/719/site3247378/web/campus-we/wp-includes/plugin.php(25): require()
#1 /home/.sites/719/site3247378/web/campus-we/wp-settings.php(50): require_once('/home/.sites/71...')
#2 /home/.sites/719/site3247378/web/campus-we/wp-config.php(118): require_once('/home/.sites/71...')
#3 /home/.sites/719/site3247378/web/campus-we/wp-load.php(50): require_once('/home/.sites/71...')
#4 /home/.sites/719/site3247378/web/campus-we/wp-admin/admin-ajax.php(22): require_once('/home/.sites/71...')
#5 {main}
  thrown in /home/.sites/719/site3247378/web/campus-we/wp-includes/class-wp-hook.php on line 586