( ! ) Fatal error: Interface 'Symfony\Component\DependencyInjection\Dumper\DumperInterface' not found in /var/www/clients/client0/web4/web/vendor/symfony/dependency-injection/Dumper/Dumper.php on line 21
Call Stack
#	Time	Memory	Function	Location
1	0.0000	360736	{main}( )	.../Dumper.php:0