Knime extension download error

[ScottF]

Hi @rolandnemeth -

Could you take a look at this thread and see if some the suggestions are helpful?

Need an Urgent help after 4.2.3 installation

My PC was upgraded and I asked for 4.2.3 installation. now I’m getting errors to update sites: Some sites could not be found. See the error log for more detail. Unable to read repository at https://update.knime.com/community-contributions/trusted/4.2/content.xml. sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Unable to read repository at https://upda…