WebSocket authentication fails

While running the Refinitiv WebSocket Contributing demo code - we are able to obtain an access_token, and a refresh_token; however, the Login call fails with the following received response:

RECEIVED:

[

{
"Domain":"Login",
"ID":1,
"Private":true,
"State":{
"Code":"NotEntitled",
"Data":"Suspect",
"Stream":"Closed",
"Text":"AAA retrieval of CAPI for UUID failed. Issued by CSG"
},
"Type":"Status"
}
]

WebSocket Closed

The refresh-token request responds with:

RDP-API Gateway authentication HTTP code: 400 Bad Request

response : {
"error":"invalid_grant"
}

And we don't even get to the POST step.

Please advise