Help! My Domain Controller Certificates Won’t Renew

Hey everyone! I've been struggling for about two days trying to get the certificates for my two domain controllers to renew, but they're all expired. I've already tried updating the Group Policy to automatically renew the certificates, but that didn't work. When I attempted to manually renew the certificates, I received an error stating that the requested certificate template is not supported by the Certification Authority (CA). I also tried generating new certificates, but I'm getting another error about not being able to submit the request to the CA, with an RPC server unavailable message. I've checked RPC and DCOM, and everything seems fine. Any advice on what I should try next? Thanks!