Connect-APS fails with "Autodesk Platform Service (APS) Connection failed"

Issue

When using Connect-APS the connection fails with

Autodesk Platform Service (APS) Connection failed: One or more errors occurred. (Error loading discovery document: Error connecting to https://developer.api.autodesk.com/.well-known/openid-configuration. No such host is known. (developer.api.autodesk.com:443).)

Cause

This can happen if there are port conflicts on the local machine between the callback URL and another program. A common issue would be powerGateServer, which uses 8080 per default.

Solution

You have to resolve the port conflict. The easiest way to do so is to change your callback URL.

Open https://aps.autodesk.com/hubs/

Login to the Autodesk account that hosts your APS app

Change the port in your call back URL to something else than 8080 like 8081

Update the URL in your Connect-APS call and try again