Error when trying to run playbook to install vsftpd package

Hello so I have a problem, I am trying to install vsftpd in debian 9 with ansible, but I always get this error:

ERROR! Invalid callback for stdout specified: yaml

This is my playbook

I have tried to run it with

ansible-playbook -v debian163.yml

and it still didnt work, anyone know why?

With so little information and context, it is impossible to tell what is going on.
Provide at least the playbook, the ansible version, and its configuration.