Error launching IM with Ansible 2.4.0

[micafer]

  File "/usr/local/bin/im_service.py", line 30, in <module>
    from IM.InfrastructureManager import InfrastructureManager
  File "/usr/local/lib/python2.7/dist-packages/IM/InfrastructureManager.py", line 23, in <module>
    import IM.InfrastructureInfo
  File "/usr/local/lib/python2.7/dist-packages/IM/InfrastructureInfo.py", line 23, in <module>
    import IM.ConfManager
  File "/usr/local/lib/python2.7/dist-packages/IM/ConfManager.py", line 38, in <module>
    from IM.ansible_utils.ansible_launcher import AnsibleThread
  File "/usr/local/lib/python2.7/dist-packages/IM/ansible_utils/ansible_launcher.py", line 41, in <module>
    from ansible.vars import VariableManager
ImportError: cannot import name VariableManager