Fatal error: Uncaught Error: Class 'Maknz\Slack\Payload' not found in /home/nextgenc/shieldlink.app/inventory/vendor/alek13/slack/src/AttachmentField.php:4 Stack trace: #0 {main} thrown in /home/nextgenc/shieldlink.app/inventory/vendor/alek13/slack/src/AttachmentField.php on line 4