Point coordinates in double brackets [[lon, lat]]: the spec example error

What the Information System does

"Point geometry types consist of two coordinate values" (GeoJSON File Description, Definitions): one position, not a list of them (RFC 7946, §3.1.2). Version 1.5 of the specification lists this exact mistake among its data representation issues: "The coordinates for points should be array and not array of arrays" (GeoJSON File Description v1.5, §6.14).

A broken example

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {
        "ProducerCountry": "CI",
        "ProductionPlace": "Nested point",
        "Area": 2
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          [-5.123456, 6.123456]
        ]
      }
    }
  ]
}

What the checker reports for this file:

1. This Point's coordinates are [[lon, lat]] instead of [lon, lat]. The Information System renders no coordinates for it, so the plot vanishes without an error., line 13, column 24

Fix it in EUDRplot

1. Open the file in the checker. Every nested point is listed; the map cannot place them until they are fixed.
2. Unwrap them. Choose Unwrap the point, or Fix N safe problems to do it with the other safe fixes. [[-4.377412, 5.324871]] becomes [-4.377412, 5.324871] and nothing else changes.
3. Fix the template. If your file was generated from a template or a script, fix the extra brackets there too, or the next file will have the same problem.

Fix it in QGIS

GDAL, which QGIS uses to read GeoJSON, may refuse or misread a point written this way, so the fix is in the text: remove the outer pair of brackets around each point's coordinates. The checker does this for every point in one step.