Downloading Extensions by Adding Local Update Sites - Unhandled event loop exception

Hello,

I have Version 5.2 of KNIME and I’m trying to install KNIME extensions by Adding Local Update Sites (have organization restrictions on connections to remote sites).

I followed the steps detailed in KNIME Analytics Platform Installation Guide but I’m getting the error “Unhandled event loop exception” as seen below:

Would anyone have any suggestions on how to get the extensions?

Thank you