API stops working after a page refresh

I hope someone can help with this. (Please keep in mind that my technical knowledge is limited)

I created this test page:
https://www.posterpresentations.com/research/PI1065/DELETEME/basit-iqbal-php-framework.html

The PDF displays properly but after you refresh the page it disapears.... 

I tested is in multople browsers with no luck.

Here is the code I use:

<div id="adobe-dc-view"></div>
<script src="https://documentcloud.adobe.com/view-sdk/main.js"></script>
<script type="text/javascript">
document.addEventListener("adobe_dc_view_sdk.ready", function(){
var adobeDCView = new AdobeDC.View({clientId: "c0ed52a26e894bb988b9242e11480d7c", divId: "adobe-dc-view"});
adobeDCView.previewFile({
content:{location: {url: "https://www.posterpresentations.com/research/PI1065/DELETEME/PHP%20framework.pdf"}},
metaData:{fileName: "PHP Framework"}
}, {defaultViewMode: "FIT_WIDTH", showAnnotationTools: false});
});
</script>

Any suggestions?