PDF Embed API error while initializing AdobeDC.View

A wired issue is comming in one of our applicaton.

When we initialize AdobeDC.View we are getting an iFrame error.

var adobeDCView = new AdobeDC.View({
clientId: "95c21d7a16f446babca99abd2d935508"
});

And here is the error

I am loading  viewer.js corerctly

<script type="text/javascript" src="https://acrobatservices.adobe.com/view-sdk/viewer.js"></script>

export function showPDF() {

    
    if (window.AdobeDC) displayPDF2(pdfData,filename,client);
    else document.addEventListener("adobe_dc_view_sdk.ready",
        () => displayPDF2(pdfData,filename,client));
}


export function displayPDF2() {

    const viewerConfig = {
        embedMode: "LIGHT_BOX",
        showDownloadPDF: true,
        showPrintPDF: true,
        showThumbnails: true,
        showBookmarks: true,
        defaultViewMode: "FIT_WIDTH",
        exitPDFViewerType: "CLOSE" 

    };
    console.log(1);
    var adobeDCView = new AdobeDC.View({
       
        clientId: "95c21d7a16f446babca99abd2d935508"
        
    });
   // Rest of the code removed.
}

Ideally i expected something like this to happen right after calling AdobeDV.View

Any idea why I am getting the iFrame error ?

Thanks in advance !!