![](https://www.incredigeek.com/home/wp-content/uploads/2021/02/image-2.png)
If you get the above error when you try running
ansible-playbook -i inventory/hosts setup.yml --tags=setup-system-user
Check and verify that you have [matrix_servers] in your inventory/hosts file
That file should contain the following.
[matrix_servers] matrix. ansible_host= ansible_ssh_user=root