How to fix the error after installing the root certificate?

Good afternoon. After you install the root certificate on the server (Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.73-2+deb7u2 x86_64) checking
openssl s_client -connect -CAfile /etc/ssl/certs/ca-certificates.crt

It turns out the error:
Verify return code: 20 (unable to get local issuer certificate)

While than on the other server everything is OK. what could be the problem?
June 8th 19 at 16:45
1 answer
June 8th 19 at 16:47
The system knows nothing about the one who issued the cert. Need the root certificate to add.

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