unable to find valid certification path to requested target

What possibly could I be missing? vRO 7.1; Added remote's SSL server cert in CA keystore according to vRO configuration on inventory tab in my client. Trying to exec a simple scriptable step:

var url = new URL("https://remote:port/");

System.log(url.getContent());

Getting this:

HTTP GET error : sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Are there any quirks with running something like this? Seems like an obvious error but I can't figure out how to fix it