500 Error on all ACS chat endpoints

Question

I'm currently getting a 500 error for all frontend requests to ACS. This includes /chat/threads/.../messages, .../read_receipts, .../typing, etc. I'm using the default js library to make these requests. The websocket connection seems to work fine (anything to teams.microsoft.com works fine, anything to azure.com does not). The failed response is always the same:

{
    "CommunicationError": {
        "Code": "InternalServerError",
        "Message": "The server could not fulfill the request due to some unexpected failure.",
        "Details": []
    }
}

I haven't changed anything (haven't even deployed lately), and don't see any status incidents on the portal, so I'm really not sure what's going on. Any help would be much appreciated!

Answer

Update: seems to be back to normal now. Not sure what happened but don't think it was an issue on my end.

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500 Error on all ACS chat endpoints

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