part of playbook output showing a type_debug|value of var and then the error displayed when using that var with the group module

playbook output

 ________________________________________ 
< TASK [theatro-noc.share_drive : debug] >
 ---------------------------------------- 
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

task path: /home/cognifloyd/p/theatro-ansiblehost/ansible-playbooks.git/roles/theatro-noc.share_drive/tasks/Linux.yaml:35
ok: [devopsvagrant] => {
    "msg": "AnsibleVaultEncryptedUnicode|encryptedgroupname"
}
 _____________________________________________________________ 
/ TASK [theatro-noc.share_drive : Add the NFS access group to \
\ access the NAS]                                             /
 ------------------------------------------------------------- 
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

task path: /home/cognifloyd/p/theatro-ansiblehost/ansible-playbooks.git/roles/theatro-noc.share_drive/tasks/Linux.yaml:38
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: TypeError: u'encryptedgroupname' is not JSON serializable
fatal: [devopsvagrant]: FAILED! => {"msg": "Unexpected failure during module execution.", "stdout": ""}
        to retry, use: --limit @/home/cognifloyd/.ansible/retry/devops_controller.playbook.retry
 ____________ 
< PLAY RECAP >
 ------------ 
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

devopsvagrant              : ok=24   changed=0    unreachable=0    failed=1   

tasks snippet

- debug:
    msg: "{{ nas_group_name | type_debug }}|{{ nas_group_name }}"

- name: Add the NFS access group to access the NAS
  become: yes
  group:
    name: "{{ nas_group_name }}"
    gid: "{{ nas_group_id }}"
  when: nas

traceback from -vvv

<127.0.0.1> ESTABLISH SSH CONNECTION FOR USER: vagrant
<127.0.0.1> SSH: EXEC ssh -o UserKnownHostsFile=/dev/null -o IdentitiesOnly=yes -o ForwardAgent=yes -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking=no -o Port=2222 -o 'IdentityFile="/home/cognifloyd/p/theatro-ansiblehost/ansible-playbooks.git/vagrant/devops/.vagrant/machines/devopsvagrant/virtualbox/private_key"' -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=vagrant -o ConnectTimeout=30 -o ControlPath=/home/cognifloyd/.theatro/ssh-cp/%h-%p-%r 127.0.0.1 '/bin/sh -c '"'"'echo ~vagrant && sleep 0'"'"''
<127.0.0.1> (0, '/home/vagrant\n', '')
<127.0.0.1> ESTABLISH SSH CONNECTION FOR USER: vagrant
<127.0.0.1> SSH: EXEC ssh -o UserKnownHostsFile=/dev/null -o IdentitiesOnly=yes -o ForwardAgent=yes -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking=no -o Port=2222 -o 'IdentityFile="/home/cognifloyd/p/theatro-ansiblehost/ansible-playbooks.git/vagrant/devops/.vagrant/machines/devopsvagrant/virtualbox/private_key"' -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=vagrant -o ConnectTimeout=30 -o ControlPath=/home/cognifloyd/.theatro/ssh-cp/%h-%p-%r 127.0.0.1 '/bin/sh -c '"'"'( umask 77 && mkdir -p "` echo /home/vagrant/.ansible/tmp/ansible-tmp-1542735400.33-93337997583736 `" && echo ansible-tmp-1542735400.33-93337997583736="` echo /home/vagrant/.ansible/tmp/ansible-tmp-1542735400.33-93337997583736 `" ) && sleep 0'"'"''
<127.0.0.1> (0, 'ansible-tmp-1542735400.33-93337997583736=/home/vagrant/.ansible/tmp/ansible-tmp-1542735400.33-93337997583736\n', '')
The full traceback is:
Traceback (most recent call last):
  File "/home/cognifloyd/v/st2/lib/python2.7/site-packages/ansible/executor/task_executor.py", line 139, in run
    res = self._execute()
  File "/home/cognifloyd/v/st2/lib/python2.7/site-packages/ansible/executor/task_executor.py", line 603, in _execute
    result = self._handler.run(task_vars=variables)
  File "/home/cognifloyd/v/st2/lib/python2.7/site-packages/ansible/plugins/action/normal.py", line 46, in run
    result = merge_hash(result, self._execute_module(task_vars=task_vars, wrap_async=wrap_async))
  File "/home/cognifloyd/v/st2/lib/python2.7/site-packages/ansible/plugins/action/__init__.py", line 738, in _execute_module
    (module_style, shebang, module_data, module_path) = self._configure_module(module_name=module_name, module_args=module_args, task_vars=task_vars)
  File "/home/cognifloyd/v/st2/lib/python2.7/site-packages/ansible/plugins/action/__init__.py", line 177, in _configure_module
    environment=final_environment)
  File "/home/cognifloyd/v/st2/lib/python2.7/site-packages/ansible/executor/module_common.py", line 972, in modify_module
    environment=environment)
  File "/home/cognifloyd/v/st2/lib/python2.7/site-packages/ansible/executor/module_common.py", line 742, in _find_module_utils
    python_repred_params = repr(json.dumps(params))
  File "/usr/lib64/python2.7/json/__init__.py", line 244, in dumps
    return _default_encoder.encode(obj)
  File "/usr/lib64/python2.7/json/encoder.py", line 207, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/usr/lib64/python2.7/json/encoder.py", line 270, in iterencode
    return _iterencode(o, 0)
  File "/usr/lib64/python2.7/json/encoder.py", line 184, in default
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: u'encryptedgroupname' is not JSON serializable

fatal: [devopsvagrant]: FAILED! => {
    "msg": "Unexpected failure during module execution.", 
    "stdout": ""
}