Unable to open spotfire information links in KNIME

I am performing a demo to read data from spotfire information links in KNIME analytics platform.

I entered the spotfire server url along with the path to the info link and the spotfire username and password in the "TIBCO Spotfire Information Link Reader" Node. But when i click Apply/OK, i get this error: "failed to apply settings: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target".

Has anyone tried this?

Any help appreciated.

Thanks,

Navjeet

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