Error Message when trying to install extensions

KNIME Extensions
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1

hi,

when I tried to install Knime Extentions, I go tstuck in step one and below is the error msg 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/5.2/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/5.2/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/5.2/content.xml.

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

knim error msg - installing extention
knim error msg - installing extention365×528 17 KB

can anyone help me here? thanks a lot

2

Hi @yaoranzhang and welcome to the forum.

This is a pretty common issue, and usually the fix is pretty simple. Take a look at this thread and see if it helps you:

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