?
Hi Christian, the information you posted had mentioned internal packages (Aeon Framework, etc), so I removed it
That said, it wasn't an error message, but a JSON document that contained metadata information about packages. This is an expected response if you visit an API URL directly in your browser, and when the npm client relies on the JSON data.
If you are receiving an error from the npm client, please make sure to share:
the precise error message that npm client is using
the precise URL that the npm client is requesting; you can get this by running Fiddler, and seeing the requests that the client makes
Note that you will need to disable Windows Integrated Authentication at the IIS level, not just within ProGet.