The configuring ESP HTTPS section of the Installing and configuring book has a couple of issues:

1 - "The following example, creates a 1024-bit RSA Private Key which is encrypted using Triple-DES encryption andstored in Privacy Enhanced Mail (PEM) format.openssl genrsa -des3 -out server.key 1024"

1024-bit key no longer valid, and will cause a runtime issue, should guide creating a  >= 2048 key

2 - Step # 4 of the "Installing the Private Key and Certificate to your ESPServer" section references a file called private.key which was create in previous step as server.key.

FYI