ExportDataFailed Error from Embed API

As mentioned by stevenamani , calling exportData multiple times does seem to work.  Here's a quick-and-dirty function you can call in your code that will do the retries (4 retries).  Just pass the visual you're wanting to export data from as parameter. 

  async function exportData(visual: VisualDescriptor): Promise<models.IExportDataResult> {
    // starting on 12/16/2021, exportData throws error.
    // If call exportData repeatedly a few times then it starts to work.
    // Implement pattern to try 4 times before throwing an error

    let tries = 0;
    let result: models.IExportDataResult;
    while (tries < 4) {
      try {
        result = await visual.exportData(models.ExportDataType.Summarized);
        break;
      } catch (err) {
        tries++;
        if (tries === 4) {
          throw err;
        }
      }
    }

    console.log(`exportData [tries]: ${tries}`);

    return result;
  }

And in your code where calling exportData currently throws an exception, replace 

const result: models.IExportDataResult = await visual.exportData(models.ExportDataType.Summarized);

  with

const result: models.IExportDataResult = await exportData(visual);