WebViewer Server + PDFTron PDFNet must be initialized with a valid key exception

We are using demo license in React Client and WebViewer Server.
In React Client, I have used it while initializing WebViewer

Still I am getting This product must be initialized with a valid key.

WebViewer(
{

            licenseKey:                'demo:xxxxx.xxxxxxxxxx@xxxxxxxx.com:7af85fdc0200000000e7c685f4c2bfc65075db0229a0627d742d320d01',
            path: '/webviewer/lib',
            //webviewerServerURL: 'https://demo.pdftron.com/',
            webviewerServerURL: 'http://localhost:8090/',
           
          },
          this.viewer.current,
        ).then((instance) => {
          const {
            documentViewer,
            annotationManager,
            Annotations,
            Search,
          } = instance.Core
          const { Feature } = instance.UI
          instance.UI.enableFeatures([Feature.FilePicker])

         
          const base64 = this.state.FileBase64
          instance.UI.loadDocument(
            this.base64ToBlob(base64, this.state.FileExt),
            {
              filename: this.state.FileName,
            },
          )
        })

Hello, I’m Ron, an automated tech support bot :robot:

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:APIs:Forums:

Hi @system @Team
I have already reviewed below reference links and code is as per them

Hello akashzinzuwadia26,

We have guides available for troubleshooting license key issues available here: PDFTron Systems Inc. | Documentation

Please let us know if this is able to help.

Best Regards,
Carlo Mendoza
Software Developer
PDFTron Systems, Inc.