Unable to create servers with Ansible (2.1.1.0)

Hi all, I was trying to create servers using Ansible following the documentation, whitout any success.

Try #1:

Using a test.yml file with the following content:

---
 - hosts: localhost
  become: yes
  connection: local
  gather_facts: False

  tasks:
    - name: Provision a set of instances
      profitbricks:
         subscription_user: “myuser"
         subscription_password: “mypass"
         datacenter: mydatacenter
         name: util-01.mydomain.com
         cores: 4
         ram: 4096
         volume_size: 50
         image: a3eae284-a2fe-11e4-b187-5f1f641608c8
         location: de/fra
         count: 1
         assign_public_ip: true
         wait_timeout: 300
      register: profitbricks
    - debug: msg="{{profitbricks}}"

Running with "ansible-playbook test.yml -vvv" getting the following error :

..."module_name": "profitbricks"}, "msg": "failed to set instance state: unsupported operand type(s) for +: 'int' and 'str'"}

Test #2: Created a role and using inventory file and group_vars with a "deploy-environment.yml" file with the following content:

    ---
- hosts: localhost
  become: yes
  connection: local
  gather_facts: False
  roles:
    - { role: profitbricks, tags: ["profitbricks_create"] }

And running with "ansible-playbook -i inventory/myenvironment deploy-environment.yml -vvv" getting the following error:

"msg": "profitbricks required for this module"

Some basic infos:

    ansible --version
ansible 2.1.1.0

    pip list |grep profitbricks
profitbricks (2.3.4)

 python -V
Python 2.7.10

Any hint would be appreciated.

Best regards,