I have license, but still show watermark

Hello there @Logan ,
I use the viewer SDK and created an profile with free license key, then added it to WebViewer constructor but in my console it says

PDFJS.express: A valid license key is required to use the view only build of PDF.js Express.


and here is the WebViewer constructor

WebViewer({
        licenseKey: 'added key here',
        path: 'path/to/js/PDFJSExpress/lib', // path to the PDF.js Express'lib' folder on your server
        initialDoc: 'some url here',
      }, document.getElementById('viewer'))

and I followed the instructions in Manuall Integration.

thanks,
Kingie