No value provided for variable {TileMatrix}

[auspex]

With leaflet

"leaflet": "^1.9.3",
"leaflet-image": "^0.4.0",

in my package.json (the values I get from npm install leaflet-image), and the following code:

        var map = L.map("towMap", {
                            preferCanvas: true,
                            layers: [
                                baseLayer, 
                                towTrack,
                                sampleLayer
                            ] })
        leafletImage(map, function (err, canvas) {
...

I get the error

No value provided for variable {TileMatrix}

baseLayer is from L.GIBSLayer (gibs-leaflet package), so perhaps is not CORS-compliant as required (I have no idea how to test that), but if that's the case the error message could be more obvious.