Highchart-export-server is exporting only once - Stack Overflow

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I am using highcharts-export-server node modules version 4.0.2. It is exporting the data only once, after that it is not exporting the data without any error. After restart it works but again only once. Am I doing anything wrong? Is it a good way to always killPool after each export.

const options = {
  export: {
    type: format,
    options: chartConfiguration
  }
};
const exportSettings = this.highChartExporter.setOptions(options);
await this.highChartExporter.initExport(exportSettings);
console.log( this.deviceData );
return this.highChartExporter
  .startExport(exportSettings, async (error: any, info: any) => {
    console.log( info );
    this.highChartExporter.killPool();
    return { type: "Sucess", data: info.result, message: "Request Processed" };
  })
  .catch((error: any) => {
    this.highChartExporter.killPool();
    return { type: "Failure", data: undefined, message: error };
  });

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