( ! ) Fatal error: Class Magento\Framework\Config\FileIterator contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Countable::count) in /var/www/vpcl/var/www/html/vendor/magento/framework/Config/FileIterator.php on line 16
Call Stack
#	Time	Memory	Function	Location
1	0.0038	382872	{main}( )	.../index.php:0
2	0.0463	543304	Magento\Framework\App\Bootstrap::create( )	.../index.php:38
3	0.0473	562096	Magento\Framework\App\Bootstrap->__construct( )	.../Bootstrap.php:123
4	0.0473	562096	Magento\Framework\App\ObjectManagerFactory->create( )	.../Bootstrap.php:208
5	0.0531	741152	Magento\Framework\App\ObjectManagerFactory->_loadPrimaryConfig( )	.../ObjectManagerFactory.php:136
6	0.0538	814448	Magento\Framework\ObjectManager\Config\Reader\Dom->read( )	.../ObjectManagerFactory.php:275
7	0.0538	814448	Magento\Framework\App\Arguments\FileResolver\Primary->get( )	.../Filesystem.php:126
8	0.0556	817624	Magento\Framework\Config\FileIteratorFactory->create( )	.../Primary.php:47
9	0.0556	817624	spl_autoload_call ( )	.../FileIteratorFactory.php:37
10	0.0556	817688	Composer\Autoload\ClassLoader->loadClass( )	.../FileIteratorFactory.php:37
11	0.0557	817800	Composer\Autoload\includeFile( )	.../ClassLoader.php:322
12	0.0557	818728	include( '/var/www/vpcl/var/www/html/vendor/magento/framework/Config/FileIterator.php' )	.../ClassLoader.php:444