Error: "Unable to configure RSA server private key"

This is specific to the correct private key for the certificate. See if the certificate modulus matches the private key modulus by using the following commands:

To view the certificate modulus:

openssl x509 -noout -text -in certfile -modulus

To view the key:

openssl rsa -noout -text -in keyfile -modulus

Check that the certificate and private key is saved in a text doc, and that it has no trailing spaces. The "modulus" and "public exponent" portions in the key and the certificate must match exactly.