Ansilbe AWX python error ansible.plugins.callback.awx_display.CallbackModule

I am getting error while running a playbook from ansible AWX tower. How can i fix this?

I am running AWX 15.0.1 Ansible 2.9.14

(WARNING): Failure using method (v2_runner_item_on_ok) in callback plugin
(<ansible.plugins.callback.awx_display.CallbackModule object at
0x7f97c9845cf8>): Object of type 'AnsibleUnsafeBytes' is not JSON serializable

PLAY (pay1) ****************************************************
META: ran handlers

(WARNING): Failure using method (v2_runner_item_on_ok) in callback plugin
(<ansible.plugins.callback.awx_display.CallbackModule object at
0x7f97c9845cf8>): Object of type 'AnsibleUnsafeBytes' is not JSON serializable


Callback Exception: 
  File "/usr/lib/python3.6/site-packages/ansible/executor/task_queue_manager.py", line 327, in send_callback
    method(*new_args, **kwargs)
   File "/var/lib/awx/venv/awx/lib/python3.6/site-packages/ansible_runner/display_callback/module.py", line 495, in v2_runner_item_on_ok
    with self.capture_event_data('runner_item_on_ok', **event_data):
   File "/usr/lib64/python3.6/contextlib.py", line 81, in __enter__
    return next(self.gen)
   File "/var/lib/awx/venv/awx/lib/python3.6/site-packages/ansible_runner/display_callback/module.py", line 100, in capture_event_data
    event_context.dump_begin(sys.stdout)
   File "/var/lib/awx/venv/awx/lib/python3.6/site-packages/ansible_runner/display_callback/events.py", line 196, in dump_begin
    self.cache.set(":1:ev-{}".format(begin_dict('uuid')), begin_dict)
   File "/var/lib/awx/venv/awx/lib/python3.6/site-packages/ansible_runner/display_callback/events.py", line 71, in set
    partial_data = json.dumps(value, cls=AnsibleJSONEncoderLocal)
   File "/usr/lib64/python3.6/json/__init__.py", line 238, in dumps
    **kw).encode(obj)
   File "/usr/lib64/python3.6/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
   File "/usr/lib64/python3.6/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
   File "/var/lib/awx/venv/awx/lib/python3.6/site-packages/ansible_runner/display_callback/events.py", line 51, in default
    return super(AnsibleJSONEncoderLocal, self).default(o)
   File "/usr/lib64/python3.6/json/encoder.py", line 180, in default
    o.__class__.__name__)