Pavlok: redirect uri included is not valid

I am trying to integrate the pavlok into a program I am building for a study. Unfortunately, the callback I included does not work when I try to use the application. I am testing the app locally. (The app is one of the example apps included in the pavlok node module: https://github.com/Behavioral-Technology-Group/Pavlok-Node-Samples/blob/master/Pavlok_RAM_Buzz/index.js)

Here is the callback uri I am using:

urn:ietf:wg:oauth:2.0:oob

Unfortunately, when I try to log in it redirects me to an error screen from pavlok that reads: "redirect uri included is not valid"

I want the callback uri to allow me to locall run the app at a local host adress.

If anyone has insights into how to get this to work I would sincerely appreciate it.

Thanks,

The A-meister

via user1354917