The full traceback is:
Traceback (most recent call last):
  File "/usr/local/Cellar/ansible/2.7.10/libexec/lib/python3.7/site-packages/ansible/executor/task_executor.py", line 140, in run
    res = self._execute()
  File "/usr/local/Cellar/ansible/2.7.10/libexec/lib/python3.7/site-packages/ansible/executor/task_executor.py", line 612, in _execute
    result = self._handler.run(task_vars=variables)
  File "/Users/patricklandolt/.ansible/roles/andrewvaughan.prompt/action_plugins/prompt.py", line 96, in run
    return self._prompt(result, args['msg'])
  File "/Users/patricklandolt/.ansible/roles/andrewvaughan.prompt/action_plugins/prompt.py", line 210, in _prompt
    var = raw_input(askstr)
NameError: name 'raw_input' is not defined

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