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

[john-skbc]

ant-design-charts-blazor.js:46
TypeError: Cannot read properties of undefined (reading 'length')

第一个打开页面正常，关掉浏览器再打开就报上面的错误。

代码

#region Example 1

readonly object[] data1 =
{
    new
    {
        type = "Error",
        value = 27
    },
    new
    {
        type = "Info",
        value = 25
    },
    new
    {
        type = "Warm",
        value = 18
    }

};

readonly PieConfig config1 = new PieConfig
    {
        Radius = 0.8,
        AngleField = "value",
        ColorField = "type",
        Label = new PieLabelConfig
        {
            Visible = true,
            Type = "inner"
        },
        Color = new string[] { "#ff4d4f", "#1890ff", "#faad14" },
        Width=260,
        Height=260

    };

#endregion Example 1

LineConfig config2 = new LineConfig
    {
        Padding = "auto",
        XField = "year",
        YField = "value",
        Height=180
        // XAxis = new ValueCatTimeAxis
        // {
        //     Type = "dateTime",
        //     TickCount = 5
        // }
    };

object[] data2 =
{
    new {year = "1991", value = 3},
    new {year = "1992", value = 4},
    new {year = "1993", value = 3.5},
    new {year = "1994", value = 5},
    new {year = "1995", value = 4.9},
    new {year = "1996", value = 6},
    new {year = "1997", value = 7},
    new {year = "1998", value = 9},
    new {year = "1999", value = 13}
};

}