TypeError when Downloading to PDF in Azure App Service: undici failure

[am35-00]

Download to PDF Not Working in Azure App Service

I'm running an express app using Node v18.19.1. My endpoint does the following:

1. Saves a document to a sharepoint folder
2. Performs the download/convert to pdf
3. Saves the downloaded pdf to a Mongo db.
4. Deletes the original file

Steps 1, 2, and 4 use the @microsoft/[email protected] package. This all works locally. However, when I deploy it to my Azure App Services (running Windows and Node v18.19.1), it breaks at step 2 with the following error:

TypeError: fetch failed at node:internal/deps/undici/undici:12625:11
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

The conversion download method:

const conversionDownloadToPdf = async (fileItemId) => {
    try {
        console.log(chalk.blue(`Attempting to downloaded file (${fileItemId})...`));

        const response = await client.api(`drives/${process.env.DRIVE_ID}/items/${fileItemId}/content?format=pdf`)
            .responseType(ResponseType.RAW) // ensure raw stream
            .get();

        const stream = await apiRequest.responseType(ResponseType.RAW).get(); // BREAKS HERE

        console.log(chalk.blue(`Stream downloaded. Streaming to buffer...`));
      
        return await toBuffer(stream);
    } catch (error) {
        console.error(chalk.red(`Full error details:`));
        console.error(chalk.red(`Message: ${error.message}`));
        console.error(chalk.red(`Status Code: ${error.statusCode}`));
        console.error(chalk.red(`Code: ${error.code}`));
        console.error(chalk.red(`Stack: ${error.stack}`));
        
        // Log the cause if available (undici errors have this)
        if (error.cause)
            console.error(chalk.red(`Cause: ${JSON.stringify(error.cause, null, 2)}`));

        throw error;
    }
}

Do I need to use that ProxyAgent? Do you have official docs on a workaround?