swift – Invalid Access Token header – Twilio Voice IOS SDK

I cloned this repo from Github which contains a short example of entering a phone number and calling that number with Twilio Voice SDK for IOS: https://github.com/twilio/voice-quickstart-ios. I generated an access token following the instructions with the command line but I get an error message when I try to initiate a call.

The command I ran:

twilio token:voice --identity=identity --voice-app-sid=AP537f...

The token:

Copy/paste this voice token into your test application:
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCIsImN0e.....

This is what jwt.io gives back for the token:

1704129998",
  "grants": {
    "identity": "identity",
    "voice": {
      "incoming": {
        "allow": true
      },
      "outgoing": {
        "application_sid": "AP53...."
      }
    }
  },
  "iat": 1704129998,
  "exp": 1704133598,
  "iss": "SK66d37615f300baee4e8902978a9bf481",
  "sub": "AC9c1a775d2a777a79387a55da7f53733c"
}

What can be the problem?