Issues when testing connection from Bitbucket

[filipefmelo]

Hi I get the following stack trace when clicking the "test connection" button in the "Webhooks" section of Bitbucket:

[2020-12-18 12:15:01,730] ERROR in app: Exception on /hooks/9q9k8fb9w7dipxoo73tab1d8xw [POST]
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/flask/app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/lib/python2.7/site-packages/flask/app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/lib/python2.7/site-packages/flask/app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/lib/python2.7/site-packages/flask/app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/lib/python2.7/site-packages/flask/app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "bitbucket.py", line 315, in hooks
    response = send_simple_webhook(hook_path, "diagnostics:ping", "Bitbucket is testing the connection to Mattermost: " + request_id, alert_color)
  File "bitbucket.py", line 297, in send_simple_webhook
    return send_webhook_data(hook_path, data)
  File "bitbucket.py", line 270, in send_webhook_data
    headers = {'Content-Type': 'application/json'}
  File "/usr/lib/python2.7/site-packages/requests/api.py", line 108, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/api.py", line 50, in request
    response = session.request(method=method, url=url, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 486, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 598, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/adapters.py", line 415, in send
    raise ConnectionError(err, request=request)
ConnectionError: ('Connection aborted.', gaierror(-2, 'Name or service not known'))
10.99.35.234 - - [18/Dec/2020 12:15:01] "POST /hooks/9q9k8fb9w7dipxoo73tab1d8xw HTTP/1.1" 500 -

Could you please point me the right direction?

Thank you in advance!