Solved
Unable to download Service pack 6.4.8
https://experience.adobe.com/#/downloads/content/software-distribution/en/aem.html?package=/content/software-distribution/en/details.html/content/dam/aem/public/adobe/packages/cq640/servicepack/aem-service-pkg-6.4.8.zip
Getting CORS errors in the browser console and unable to download the service pack 6.4.8
