Hey! So I had a few issues setting up the webhook at first. Couple of things that worked (typing on my phone so memory might be a bit off)
- did you definitely remove the $ from the account id?
- did you keep quotes around the account id?
- when you go to the “list webhooks” bit - is there an account id already listed in the box? You may need to replace the default option with the one you used (if you have a pre pay and a current account this might be why you don’t see it?)
The error you get when you go to the heroku page shouldn’t be a problem - I got the same.
Did you get an error of any kind when you made your webhook?