( ! ) Fatal error: Interface 'Symfony\Component\HttpFoundation\Session\SessionBagInterface' not found in C:\wamp64\www\simplesamlphp\vendor\symfony\http-foundation\Session\Flash\FlashBagInterface.php on line 22
Call Stack
#	Time	Memory	Function	Location
1	0.0019	246600	{main}( )	...\FlashBagInterface.php:0