Vnfm-Adapter unable to communicate with ETSI-Catalog through MSB.

When attempting to retrieve the list of VNF Packages the following error is received:

Unable to invoke HTTP POST using url: https://msb-iag.onap:443/api/vnfpkgm/v1/vnf_packages

org.springframework.web.client.ResourceAccessException: I/O error on GET request for "https://msb-iag.onap:443/api/vnfpkgm/v1/vnf_packages": sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target; nested exception is javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Please find the attached log file for the full logs output from the error. We believe this may be a certificate related issue, and we are currently investigating potential fixes.