I've just receive a certificate, containing those files: enter image description here
I don't see file private.key. So, I generate private.key by cmd: openssl req -new -newkey rsa:2048 -nodes -keyout jobsit_vn.key -out jobsit_vn.csr
And my bug: (SSL: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch)