( ! ) Fatal error: Interface 'Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\DumperInterface' not found in C:\wamp64\www\simplesamlphp\vendor\symfony\dependency-injection\Tests\Fixtures\includes\classes.php on line 85
Call Stack
#	Time	Memory	Function	Location
1	0.0264	988064	{main}( )	...\ContainerBuilderTest.php:0
2	0.0370	1021624	require_once( 'C:\wamp64\www\simplesamlphp\vendor\symfony\dependency-injection\Tests\Fixtures\includes\classes.php' )	...\ContainerBuilderTest.php:14