I'm not sure how you configured things, but the warning
VERIFY ERROR: depth=1, error=unable to get issuer certificate: C=US, O=GeoTrust, Inc., CN=RapidSSL CA
TLS_ERROR: BIO read tls_read_plaintext error: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
suggests that you've installed the wrong CA certificate (or certificate stack). Where are you getting the certificates from?