Hello,

Any idea what might cause the following error when requesting a new certificate on the staging server ( https://api.test4.buypass.no/acme/directory ) ?

{
 "code":400,
 "message":"MALFORMED_BAD_REQUEST",
 "details":"HTTP 400 Bad Request",
 "type":"urn:ietf:params:acme:error:malformed",
 "detail":"Certificate format requested not supported"
}

I am working on a custom client and up until that point everything works
fine: "new-reg" and "new-authz" for the domain is performed successfully.
But when I request a new certificate ("new-cert") I get the mentioned error message.

The same process and CSR format works without issues on Let's Encrypt, where a certificate is issued after the request.
The CSR format I use (PKCS #10) validates properly using OpenSSL

The certificate request is for a single domain with CN and subjectAltName set to the same value.

Any ideas what might be the issue?

Thank you.