Network error: error setting certificate verify locations: CAfile: /etc/pki/tls/certs/ca-bundle.crt

When enabling Stripe Payment Gateway on the Pro Sites plugin, I am getting this error when processing live credit card transactions:

Network error: error setting certificate verify locations: CAfile: /etc/pki/tls/certs/ca-bundle.crt CApath: none

I have verified that the file exists and the directory is granted 755 privileges. SSL cert is installed and configured.