node.js - 无法在实时服务器上的 highcharts-export-server 中获取数据标签

Question

1. 我正在使用 highcharts-export-server 导出图表并将其以 PDF 格式发送到电子邮件
2. 当我尝试在本地导出它时，它工作正常，但在实时服务器上，当我尝试导出所有图表数据标签消失时。

   this is the image from which was exporting from live server.

and here is the image which was exporting locally.

Here is my Code

exports.getPieChartImg = (seriesData, xOrLength, innersize, showLegend, width, height) => {
var chartOpts = {
    chart: {
        type: 'pie',
        width: width,
        height: height,
    },
    plotOptions: {
        pie: {
            innerSize: innersize || 80,
            depth: 25,
            allowPointSelect: true,
            dataLabels: {
                enabled: false,
                format: '<b>{point.name}</b>: {point.percentage:.2f} %'
            },
            showInLegend: showLegend || false,
        },
        series: {
            stacking: 'normal',
            dataLabels: {
                enabled: true,
                color: '#6f6f6f',
                format: '{point.percentage:.2f}',
                crop: false,
                overflow: "none",
            },
            pointWidth: 30,
        }
    },
    legend: {
        labelFormat: '<b>{name}</b> ({percentage:.2f})%',
        useHTML: true,
    },
    series: [{
        data: seriesData
    }]
};

var exportSettings = generateExportSettings(chartOpts, 'Pie');
return generateBase64Chart(exportSettings)
}

function generateExportSettings(chartOpts, constr) {
return {
    // b64: true,
    instr: JSON.stringify(chartOpts),
    noDownload: true,
    constr,
    globalOptions: {
        colors: ['#3BB9DA', '#0F89A8', '#0B8F8B', '#1DB1AD', '#68E3DF', '#FFB469', '#F58B1F', '#D16900', '#FC3C3C', '#FF6666', '#FC8D8D', '#FCC0C0'],
        lang: {
            thousandsSep: ','
        }
    },
    scale: false,
    styledMode: false,
    type: "image/png",
    width: false,
};
 }

function generateBase64Chart(exportSettings) {
return new Promise((resolve, reject) => {
    highchartsExporter.export(exportSettings, function (err, res) {
        if (err) {
            return reject({
                code: '1',
                err,
                msg: 'Error in stock chart',
                exportSettings
            })
        }
        return resolve({
            code: '0',
            msg: 'success',
            data: 'data:image/png;base64,' + res.data,
        })
    });
})
}

Answer 1

1. 删除node_module并重新安装。
2. 如果未安装 libfontconfig，则安装'sudo apt-get install libfontconfig'