Azure Maps Indoor Creator

Hello,

I am going through guide on https://zcusa.951200.xyz/en-gb/azure/azure-maps/tutorial-creator-indoor-maps and I am just stucked on step 4 in article "Convert a Drawing package". There should be response from API service like,

{
"operationId": "<operationId>",
"created": "2020-04-22T19:39:54.9518496+00:00",
"status": "Succeeded",
"resourceLocation": "https://atlas.microsoft.com/conversion/{conversionId}?api-version=1.0",
"properties": {}
}

but I receive only

{
"error": {
"code": "Unauthorized",
"message": "Access denied, please inspect WWW-Authenticate header.",
"target": null,
"details": []
}
}

Do you have any ideas please, how to fix this?

Thanks for any advice!