Fatal error: Cannot use 'String' as class name as it is reserved in /lib/Cake/Utility/String.php on line 26

Fatal error: Uncaught Error: Class 'String' not found in /lib/Cake/Utility/Debugger.php:341 Stack trace: #0 /lib/Cake/Utility/Debugger.php(746): Debugger::trace(Array) #1 /lib/Cake/Error/ErrorHandler.php(199): Debugger->outputError(Array) #2 [internal function]: ErrorHandler::handleError(2, 'session_start()...', '/app/Controller...', 2, Array) #3 /app/Controller/AppController.php(2): session_start() #4 /lib/Cake/Core/App.php(560): include('/app/Controller...') #5 [internal function]: App::load('AppController') #6 /lib/Cake/Controller/CakeErrorController.php(31): spl_autoload_call('AppController') #7 /lib/Cake/Core/App.php(560): include('/lib/Cake/Contr...') #8 [internal function]: App::load('CakeErrorContro...') #9 /lib/Cake/Error/ExceptionRenderer.php(154): spl_autoload_call('CakeErrorContro...') #10 /lib/Cake/Error/ExceptionRenderer.php(94): ExceptionRenderer->_getController(Object(FatalErrorException)) #11 /lib/Cake/Error/ErrorHandler.php(121): ExceptionRenderer->__construct(Object(FatalErrorException)) #12 /lib/Cake/E in /lib/Cake/Utility/Debugger.php on line 341