AttributeError

Traceback (most recent call last):
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/app.py", line 2309, in __call__
    return self.wsgi_app(environ, start_response)
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/app.py", line 2295, in wsgi_app
    response = self.handle_exception(e)
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/app.py", line 1741, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/_compat.py", line 35, in reraise
    raise value
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/app.py", line 1718, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/_compat.py", line 35, in reraise
    raise value
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/flask_login/utils.py", line 272, in decorated_view
    return func(*args, **kwargs)
  File "/Users/me/dev/merge/webapp/account/views.py", line 53, in account_createtable
    short_url = shortener.shorten_urls(new_url)
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/bitlyshortener/shortener.py", line 198, in shorten_urls
    short_urls = list(mapper(self._shorten_url, long_urls))
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/bitlyshortener/shortener.py", line 168, in _shorten_url
    url_id = self._long_url_to_int_id(long_url)
  File "/Users/me/dev/merge/.venv/lib/python3.7/site-packages/bitlyshortener/shortener.py", line 130, in _long_url_to_int_id
    response = self._thread_local.session_post.post(url=endpoint, json={'long_url': long_url},
AttributeError: '_thread._local' object has no attribute 'session_post'