Hello, 

I want to create a playbook to send notification to relevant team about the incident for that i design a playbook, namely as artifact_collected, output of artifact collected, update incident with attachment, Send email to notify. It is showing that my playbook is executing properly however, in the CLI while running the cmd "tail -f /var/log/messages" i have seen an error namely "ERROR [action_message] FunctionResult must be a dictionary. 'NoneType' may cause the workflow to fail"

Attached the screenshot of playbook and error. 

Can someone identify where i am doing wrong?