Help with the Extensions

Hello, I am trying to install Extensions in my work Mac. But this is the error I got:

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/4.4/content.xml.

PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Unable to read repository at https://update.knime.com/community-contributions/4.4/content.xml.

PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Unable to read repository at https://update.knime.com/partner/4.4/content.xml.

PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Unable to read repository at https://update.knime.com/analytics-platform/4.4/content.xml.

PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Any idea ? I think it could be something to related to proxies, but no idea on how solving it. Thanks a lot!!

Hi @Igortxu

you are exactly right, this is most likely a proxy wanting to inspect the SSL (https) traffic.
Here is a video that explains the issue in detail: Resolving Common KNIME Certificates Problems - YouTube

For a quick and dirty fix you can probably change the update sites to use unencrypted traffic (http):
Help → Install New Software… → Manage…
There, double-click the active URLs and change them from https to http.

Kind regards
Marvin

6 Likes