The "Read from HTTP" is quite useful to make HTTP calls and HTTPS calls and it does a certificate check and hostname check, if you want to bypass that check and still make the call attach the following to the SSL Parameters data binding
tw.local.sslParameters = new tw.object.Map();
tw.local.sslParameters.put("TrustTargetServer", true);
tw.local.sslParameters.put("IgnoreCertHostname", true);