Jive API. Unknown error occured when trying to obtain oauth2 access token using authorization grant flow

You can see the video of the request I made to get the access token using Oauth2.0 Authorization Code grant flow. Although I am able to get code using the step 1, I could not get access token as described in the api documentation. Find the jive api documentation at https://jive.com/developer/

Find the video of the request I made using Postman at https://youtu.be/b7B49n7sbpg

I think I see the issue. In both requests I make for the token I am not including any scopes. Now this will work for implicit Grant Flow but it will not work with the Auth Code flow. So in the initial requests be sure to add at least one valid scope or both public scopes like this:

https://auth.jive.com/oauth2/v2/grant?response_type=code&client_id=c7959b3f-b7a6-451b-8c98-252fcf950271&redirect_uri=https://promodaddy.com&scope=users.v1.lines.read%20calls.v2.initiate