( ! ) Fatal error: Trait "ApiPlatform\GraphQl\Resolver\Util\IdentifierTrait" not found in /work/home/ntrugeon/www/apivillessymfony/vendor/api-platform/core/src/GraphQl/Subscription/SubscriptionManager.php on line 33
Call Stack
#	Time	Memory	Function	Location
1	0.0012	387712	{main}( )	.../SubscriptionManager.php:0