<vich_uploader class="Hackzilla\Bundle\TicketBundle\Entity\TicketMessageWithAttachment">
    <field mapping="ticket_message_attachment" name="file" filename_property="attachmentName" />
</vich_uploader>

<vich_uploader class="Hackzilla\Bundle\TicketBundle\Entity\TicketMessageWithAttachment">
    <field mapping="ticket_message_attachment" name="attachmentFile" filename_property="attachmentName" />
</vich_uploader>

Fix vich_config - property name
Fix vich_config - property name

There was an error in Hackzilla\Bundle\TicketBundle\Entity\TicketMessageWithAttachment.xml, wrong field name value (file).
Fixed value - "attachmentFile"