Fatal error: Uncaught Error: Class "JMS\Serializer\AbstractVisitor" not found in /home/activeexcavators/public_html/vendor copy/jms/serializer/src/XmlSerializationVisitor.php:18
Stack trace:
#0 {main}
thrown in /home/activeexcavators/public_html/vendor copy/jms/serializer/src/XmlSerializationVisitor.php on line 18