Check out this post.
Media Creation Tool - error code 0X80072F8F - 0X20000 - Microsoft Community: https://answers.microsoft.com/en-us/windows/forum/all/media-creation-tool-error-code-0x80072f8f-0x20000/4f8bbe1c-b5af-4cc9-958e-c6c8f3f0b524
Also, run enable-tls.reg. Click Yes to confirm.