I need to associated an SSL certificated with my CDN
I've uploaded the certificate to the keyvault, but in order to allow CDN to use this certificate I need to grant access to CDN service principal as stated in this message:

When I try to add the access, I can't find any principal with this name. An old answer in the forums says:
"search for a Service Principal with ID "205478c0-bd83-4e1b-a9d6-db63a3e1e1c8"" But that ID is not found.
How do I solve this problem?