:( 数据出现异常:Class app\school\controller\A does not exist 
    ReflectionException: Class app\school\controller\A does not exist
    #0 /home/www/vendor/wj008/beacon/core/Route.php(553): ReflectionClass->__construct()
    #1 /home/www/vendor/wj008/beacon/core/Route.php(744): beacon\Route::runMethod()
    #2 /home/www/www/index.php(87): beacon\Route::run()
    #3 {main}