I think you are confused. Adobe Portolio servers have valid SSL certificates verified by DigiCert, Inc.
A CSR is only required when a site owner or server hosting provider is obtaining or renewing SSL certificates for their servers. I suggest you contact whoever hosts your wendywalking.photo site as the "problem" appears to be on that end, not Adobe's end.
Nancy O'Shea, Product User & Community Expert Alt-Web Design & Publishing ~ Web : Print : Graphics : Media