apple itunes connection troubles

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 7.2.0
• Cross-platform modules: 7.1.4
• iOS Runtime: 7.1.1
• XCode Version: 12.4

Describe the bug

After several weeks since the last update of our application, I tried to upload a new version to testflight.
Unfortunately all commands tns apple-login and tns appstore fail with

The server returned unexpected response: Unauthenticated

Request ID: <id-string>.0.0

Using the same credentials to log onto any of the apple developer websites continues to work fine.

Any idea what's going wrong here and how to fix it?

Inizia riproducendo il malfunzionamento con tns apple-login e tns appstore usando le versioni di CLI, iOS Runtime e XCode riportate. Esamina le indicazioni sul report diagnostico collegate nell’issue e confronta la risposta di autenticazione con il login funzionante su Apple developer website. Il lavoro è completato quando entrambi i comandi eseguono correttamente l’autenticazione e possono effettuare l’upload su TestFlight.