[Chrome] GQL error when blocking someone

{
    "data": {
        "updateRedditorBlockState": null
    },
    "errors": [
        {
            "message": "internal error",
            "path": [
                "updateRedditorBlockState"
            ]
        }
    ],
    "operation": "UpdateRedditorBlockState",
    "extensions": {
        "traceID": "8cec88ce3eddfcd18d67bc7e481eb9f7"
    }
}

I picked someone at random and hit block. The message displayed was

You can't block u/qwerty30013 for 24 hours after unblocking them

The GQL response is above.