It’s hard to tell what happened.
Here’s my SSL http config:
# grep SSLCert /etc/httpd/conf.d/ssl.conf
SSLCertificateChainFile /etc/pki/tls/certs/sub.class2.server.ca.pem
SSLCertificateFile /etc/pki/tls/certs/localhost.crt
SSLCertificateKeyFile /etc/pki/tls/private/localhost.key
Can we see yours?