Using a CA certificate returning error

nginx: [emerg] cannot load certificate “/root/bwdata/ssl/bitwarden.ourdomain.org/cert_chain.crt”: BIO_new_file() failed (SSL: error:0200100D:system library:fopen:Permission denied:fopen(’/root/bwdata/ssl/bitwarden.ourdomain.org/cert_chain.crt’,‘r’) error:2006D002:BIO routines:BIO_new_file:system lib)

I was able to get this working with letsencypt but I cant get it to work with a public CA certificate. Any thoughts?

This is on CentOS 7.6.1810