Thank you for your response.
We have now set up the Callbacks per your instructions.
Website URL
https://tranquil-cliffs-69648.herokuapp.com/
Sign in with Twitter
Enabled
Callback URL
http://tranquil-cliffs-69648.herokuapp.com/addsub
https://tranquil-cliffs-69648.herokuapp.com/addsub
http://tranquil-cliffs-69648.herokuapp.com/removesub
https://tranquil-cliffs-69648.herokuapp.com/removesub
We are now receiving the errors below when trying to manage subscriptions or receive live activity:
2018-10-16T20:32:23.651432+00:00 app[web.1]: Warning: connect.session() MemoryStore is not
2018-10-16T20:32:23.651449+00:00 app[web.1]: designed for a production environment, as it will leak
2018-10-16T20:32:23.651451+00:00 app[web.1]: memory, and will not scale past a single process.
2018-10-16T20:33:52.257783+00:00 app[web.1]: Error: Callback URL not approved for this client application. Approved callback URLs can be adjusted in your application settings
2018-10-16T20:34:32.073158+00:00 heroku[router]: at=error code=H12 desc=“Request timeout” method=GET path="/socket.io/?EIO=3&transport=polling&t=MP-bTa6&sid=wP9LzhvFXAjTDFJbAAAB" host=tranquil-cliffs-69648.herokuapp.com request_id=b60f19cd-e725-473c-8362-3f6b8c4e1903 fwd=“38.126.138.48” dyno=web.2 connect=1ms service=30000ms status=503 bytes=0 protocol=https
Thank you for your help.