encountering errors in creating a new CI policy

Hi all,

currently trying to learn how to implement WDAC on a windows 10 machine. I've run the following command to create a code integrity policy and get a number of errors. I am running this as administrator through PowerShell. Any thoughts on where I'm going wrong?

New-CIPolicy -Level PCACertificate -UserPEs -FilePath C:\Windows\System32\CodeIntegrity\Initial.xml