I can't make the bubble chart to display the bubbles

First of all thank you for the librairy it's so great.

I can't make the bubble chart work. Honestly someone should update the bubble chart exemple because i just cant find the pattern to make it work and im probably not alone i pass nearly 3 hour. I tried so many values in parameters i'm just totally lost. I succesfully make nearly all the charts to work except this one. There is just nothing that appear on the chart.

```

Earnings.Add(new
{
YField = earning.EpsEstimated,
XField = i,
size = 9269612,
type = "Estimated"
});

Earnings.Add(new
{
YField = earning.Eps,
XField = i,
size = 9269612,
type = "Actual"
});
private readonly BubbleConfig config1 = new BubbleConfig
{
YField = "YField",
XField = "XField",
SizeField = "size",
ColorField = new[] { "type" },
Color = new[] { "blue", "red" },
XAxis = new ValueTimeAxis
{
Visible = true,
Min = -5,
Max = 5,
},
YAxis = new ValueTimeAxis
{
Visible = true,
Min = -5,
Max = 5
}
};
```