( ! ) Deprecated: Symfony\Component\Serializer\Encoder\XmlEncoder::__construct(): Implicitly marking parameter $loadOptions as nullable is deprecated, the explicit nullable type must be used instead in E:\Program_Files\wamp64\www\print\vendor\symfony\serializer\Encoder\XmlEncoder.php on line 77

( ! ) Deprecated: Symfony\Component\Serializer\Encoder\XmlEncoder::buildXml(): Implicitly marking parameter $xmlRootNodeName as nullable is deprecated, the explicit nullable type must be used instead in E:\Program_Files\wamp64\www\print\vendor\symfony\serializer\Encoder\XmlEncoder.php on line 407

( ! ) Deprecated: Symfony\Component\Serializer\Encoder\XmlEncoder::appendNode(): Implicitly marking parameter $key as nullable is deprecated, the explicit nullable type must be used instead in E:\Program_Files\wamp64\www\print\vendor\symfony\serializer\Encoder\XmlEncoder.php on line 476

( ! ) Fatal error: Trait "Symfony\Component\Serializer\SerializerAwareTrait" not found in E:\Program_Files\wamp64\www\print\vendor\symfony\serializer\Encoder\XmlEncoder.php on line 27
Call Stack
#	Time	Memory	Function	Location
1	0.0139	471744	{main}( )	...\XmlEncoder.php:0