TypeError: Cannot read properties of undefined (reading 'lng')

[nakigoe]

I receive an error message
TypeError: Cannot read properties of undefined (reading 'lng')

for the following code (works OK without the plugin, but the circles ARE distorted)

pointToLayer : function(geoJsonPoint, latlng) {
        return new L.greatCircle(latlng, {
        radius: (Math.exp(geoJsonPoint.properties.mag/1.01-0.13))*4500 });
    }

[nuclearsecrecy]

I really would need to know exactly what is being passed to it to figure out what the issue is. (In some way, all it is indicating is that it isn't understanding the longitude of something, but it's impossible for me to know what is causing it from your code snippet.) Sorry.