Preview document loaded not working

WebViewer Version: 8.6.0

Do you have an issue with a specific file(s)?
Can you reproduce using one of our samples or online demos?
Are you using the WebViewer server?
Does the issue only happen on certain browsers?
Is your issue related to a front-end framework?
Is your issue related to annotations?

Please give a brief summary of your issue:

I load a document from url but this not preview inside pdftron.

I use the follow code to load the document.

					.loadDocument(url, {
						customHeaders: headers,
						extension: 'pdf',
						onLoadingProgress: (progress) => {
							if (progress !== Infinity) {
								setProgress(Math.round(progress * 100));
					.catch((e) => {
						console.log('Error', e);

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Please describe your issue and provide steps to reproduce it:
(The more descriptive your answer, the faster we are able to help you)

Please provide a link to a minimal sample where the issue is reproducible:

Hi @xander.as90,

Thanks for reaching out to WebViewer Support!

We’re going to need more information in order to help you out. Are you willing to share a sample project where we can reproduce this error? That would be very helpful for us.