When I try to get author certificate here is the error I get. Not sure what it is
Hello,
Are you talking about Watch Face Studio? Could you please clarify?
As per your this ticket Having problem getting certificate to test watch face, you are using Mojave/Ver: 10:14:6/Mac Pro.
Please check the Watch Face Studio Mac requirements https://developer.samsung.com/watch-face-studio/download.html#Requirements. Watch Face Studio does not support macOS 10.x any longer