StartSSL Certificate is missing an intermediate


I try to manually install a StartSSL Certificate because the Certificate Panel seems to be completely broken on my installation.
I followed the step for the creation of a Web server Certificates. I replaced /home/user-data/ssl/ssl_certificate.pem and /home/user-data/ssl/ssl_private_key.pem.

The certificate seems to be detected but my status said :

The SSL certificate has a problem: The certificate is missing an intermediate chain or the intermediate chain is incorrect or incomplete. (/home/user-data/ssl/ssl_certificate.pem: C = FR, CN =, emailAddress = error 20 at 0 depth lookup:unable to get local issuer certificate )

I don’t have any files to include to this certificate.

If the control panel isn’t working properly then all sorts of things might not be working. Although the certificate error is probably true, that it needs an intermediate certificate.