Error in app (has Notion blocked it?)

[ian-hls2]

File "/app/.heroku/python/lib/python3.6/site-packages/notion/client.py", line 68, in init
self._update_user_info()
File "/app/.heroku/python/lib/python3.6/site-packages/notion/client.py", line 74, in _update_user_info
records = self.post("loadUserContent", {}).json()["recordMap"]
File "/app/.heroku/python/lib/python3.6/site-packages/notion/client.py", line 188, in post
response.raise_for_status()
File "/app/.heroku/python/lib/python3.6/site-packages/requests/models.py", line 941, in raise_for_status
raise HTTPError(http_error_msg, response=self)

requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://www.notion.so/api/v3/loadUserContent