Installing extension causes InvalidAlgorithmParameterException

Hi,

KNIME 4.7.7 was installed in my laptop recently and it shows following message when I try to install the extensions:

When I click 'Yes’it throwing following errors:

Could not query updates site for missing extensions
Unable to read repository at https://update.knime.com/partner/4.7/content.xml.
Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty