Unable to activate peacock - Something unexpected happened Please close this pop up and try again

On page: https://www.xfinity.com/yoursubscriptions

I see peacock Plan: Peacock Premium; Price: Included; Status: Activation required

However, I am unable to activate peacock subscription. When I hit the activate button, I get this error:

"Something unexpected happened

Please close this pop up and try again. If the problem persists, try again later."

Looking at the network traffic in the browser, I see this error

{
    "errorCode": "XCSCP.405.1.1",
    "errorMessage": "Cas client: already activated or no entitlement found",
    "severity": "ERROR"
}

Already spent 2 hours with chat support, but they always end up terminating the chat (3 different agents did that).

Tried multiple browsers and different devices without success.

Could you please help activate my peacock subscription?