Help me! how to remove ssl certificate

Hi,

I install module ssl for VPS use Sentora...however, after install module, Sentora not run and service httpd not start. please help me? thank

this error: 

[root@zpanel ~]# service httpd status
Redirecting to /bin/systemctl status httpd.service
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2018-07-04 07:03:49 UTC; 18h ago
     Docs: man:httpd(8)
           man:apachectl(8)
  Process: 2451 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE)
  Process: 2450 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
 Main PID: 2450 (code=exited, status=1/FAILURE)

Jul 04 07:03:49 zpanel.devfastpro.com systemd[1]: Starting The Apache HTTP Server...
Jul 04 07:03:49 zpanel.devfastpro.com httpd[2450]: AH00526: Syntax error on line 57 of /etc/sentora/configs/apache/httpd-vhosts.conf:
Jul 04 07:03:49 zpanel.devfastpro.com httpd[2450]: SSLCertificateKeyFile: file '/devfastpro.com/ssl/certificate/private.key' does not exist or is empty
Jul 04 07:03:49 zpanel.devfastpro.com systemd[1]: httpd.service: main process exited, code=exited, status=1/FAILURE
Jul 04 07:03:49 zpanel.devfastpro.com kill[2451]: kill: cannot find process ""
Jul 04 07:03:49 zpanel.devfastpro.com systemd[1]: httpd.service: control process exited, code=exited status=1
Jul 04 07:03:49 zpanel.devfastpro.com systemd[1]: Failed to start The Apache HTTP Server.
Jul 04 07:03:49 zpanel.devfastpro.com systemd[1]: Unit httpd.service entered failed state.
Jul 04 07:03:49 zpanel.devfastpro.com systemd[1]: httpd.service failed.