( ! ) Fatal error: Class 'Symfony\Component\DependencyInjection\Dumper\Dumper' not found in C:\wamp64\www\simplesamlphp\vendor\symfony\dependency-injection\Dumper\XmlDumper.php on line 32
Call Stack
#	Time	Memory	Function	Location
1	0.0114	365184	{main}( )	...\XmlDumper.php:0