InfluxDB timeseries data with json location issue

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Hi, I'm struggling to get any data to show up in the map. I've tried many different suggestions from many threads, but so far, no joy. I don't even get an error message to point me in the right direction. Here is my current query config:

data is successfully being retrieved:

The location config: The endpoint is my own server - the inspector shows that it's successfully retrieving:

[
    {
        "key": "1",
        "latitude": 48.179554,
        "longitude": 11.595701,
        "name": "Windowsill"
    },
    {
        "key": "0",
        "latitude": 48.179596,
        "longitude": 11.5955515,
        "name": "Desk"
    }
]