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I/O error on GET request for "https://mundojoven.carm.es/mundojoven/rest/service/LISTADO_CONVOCATORIAS_ABIERTAS?codigo_portal=499673":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