I keep getting this error I am using the correct API and the sub domain in my Thinkific URL.
We hit an error adding your new account
authentication failed: The app returned "Authentication Error".
- Make sure you click "Allow" or "Accept" on the permission popup
- Double check your Account has the correct permissions
- Check out our help docs for more information
Try using a Private Browser to authenticate the app and make sure you browser isn’t blocking popups.
Just checking in to see if you still need help with this?