Fatal error: Cannot use 'String' as class name as it is reserved in /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Utility/String.php on line 27

Fatal error: Uncaught Error: Class 'String' not found in /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Utility/Security.php:68
Stack trace:
#0 /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Controller/Component/SecurityComponent.php(532): Security::generateAuthKey()
#1 /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Controller/Component/SecurityComponent.php(247): SecurityComponent->generateToken(Object(CakeRequest))
#2 /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Utility/ObjectCollection.php(132): SecurityComponent->startup(Object(CakeErrorController))
#3 /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Event/CakeEventManager.php(248): ObjectCollection->trigger('startup')
#4 /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Controller/Controller.php(675): CakeEventManager->dispatch(Object(CakeEvent))
#5 /usr/www/users/paraglu/naturopathy.co.za/app/Plugin/Croogo/Controller/CroogoErrorController.php(54): Controller->startupProcess()
#6 /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Error/ExceptionRenderer in /usr/www/users/paraglu/naturopathy.co.za/lib/Cake/Utility/Security.php on line 68