( ! ) Fatal error: Class 'Symfony\Component\Config\Definition\Builder\NodeBuilder' not found in /var/www/clients/client0/web4/web/vendor/symfony/config/Tests/Fixtures/Builder/NodeBuilder.php on line 16
Call Stack
#	Time	Memory	Function	Location
1	0.0002	360624	{main}( )	.../TreeBuilderTest.php:0
2	0.0003	361176	require( '/var/www/clients/client0/web4/web/vendor/symfony/config/Tests/Fixtures/Builder/NodeBuilder.php' )	.../TreeBuilderTest.php:18