junos error

[Daley Okuwa]

Hello I am trying to backup config on a juniper router without success

and getting an error message 

ansible@ansible-new:/etc/ansible$ ansible-playbook -i  hosts backup_config-junos-facts.yml --user=ansible --extra-vars "ansible_sudo_pass=xxxx"

PLAY [collect default set of facts] ********************************************

TASK [Gathering Facts] *********************************************************
ok: [10.101.250.41]

TASK [collect default sets of facts and configuration] *************************
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: TypeError: argument must be string or read-only character buffer, not None
fatal: [10.101.250.41]: FAILED! => {"changed": false, "module_stderr": "Traceback (most recent call last):\n  File \"/tmp/ansible_vRkO_Y/ansible_module_junos_facts.py\", line 346, in <module>\n    main()\n  File \"/tmp/ansible_vRkO_Y/ansible_module_junos_facts.py\", line 327, in main\n    inst.populate()\n  File \"/tmp/ansible_vRkO_Y/ansible_module_junos_facts.py\", line 130, in populate\n    reply = self.rpc('get-software-information')\n  File \"/tmp/ansible_vRkO_Y/ansible_module_junos_facts.py\", line 118, in rpc\n    return send_request(self.module, Element(rpc))\n  File \"/tmp/ansible_vRkO_Y/ansible_modlib.zip/ansible/module_utils/netconf.py\", line 42, in send_request\n  File \"/tmp/ansible_vRkO_Y/ansible_modlib.zip/ansible/module_utils/connection.py\", line 66, in exec_command\n  File \"/usr/lib/python2.7/socket.py\", line 228, in meth\n    return getattr(self._sock,name)(*args)\nTypeError: argument must be string or read-only character buffer, not None\n", "module_stdout": "", "msg": "MODULE FAILURE", "rc": 0}
 [WARNING]: Could not create retry file '/etc/ansible/backup_config-junos-
facts.retry'.         [Errno 13] Permission denied: u'/etc/ansible
/backup_config-junos-facts.retry'

This is the code 

---

- name: collect default set of facts
  hosts: 10.101.250.41
  connection: local

  tasks:

  - name: collect default sets of facts and configuration
    junos_facts:
      gather_subset: config