APIs not allowed on this PDF

try {
    await viewSDKClient.ready();
    const filePromise = Promise.resolve(file.arrayBuffer);

    // Pass the filePromise and name of the file to the previewFile API
    const adobeViewerPromise = viewSDKClient.previewFileUsingFilePromise(
        `pdf-div-${file.name}`, filePromise, file.name, UploadSizedContainerConfig);

    const adobeViewer = await adobeViewerPromise;
    const annotationManager = await adobeViewer.getAnnotationManager();

    const res = await annotationManager.removeAnnotationsFromPDF();
    return Promise.resolve({
        pdfBuffer: res["pdfBuffer"],
        annotations: res["annotations"]
    });
} catch (err) {
    console.error(err);
    return Promise.resolve({});
} finally {
...
}

And I keep getting this error: 

{code: 'FAIL', message: 'APIs not allowed on this PDF.'}

Please help. thanks