Unable to verify certificate 'Server-Cert'. Add "NSSEnforceValidCerts off" to nss.conf so the server can start until the problem can be resolved
# vim /etc/httpd/conf/httpd.conf
add text "NSSEnforceValidCerts off"
and then save.
For reference How to know certification expiration date
Please execute command below.
# certutil -L -d /etc/httpd/alias -n Server-Cert
Restart service nss
# service nscd restart
Restart Service apache
# service httpd restart
Reff : https://ecl.ntt.com/en/news/2016122801/
