I've been trying to follow https://developers.ringcentral.com/guide/team-messaging/manual/local-bots I have followed every step as written in the guide, but when I make it to step 7, I get an error saying that my oauth redirect url didn't return a successful response. I setup the Oauth redirect URL as outlined in the guide, pointing it at my ngrok URL. I am able to access the Oauth redirect URL from the internet (on another computer) on my own, I can also see my request in the console of the node app. But I never see the request coming into the node app when I perform step 7.
I noticed that this guide is about 4 years old, has something changed? Are there any additional troubleshooting steps?