Missing Nodes in Numeric Distances Workflow

I am just starting to use KNIME.  I have installed the Numeric Distances Workflow and tried to start working through it but I cannot even start because I get an error message stating the "Workflow contains missing nodes - Errors during load due to missing nodes (Single Selection Input QuickForm).  Do you want to search and install the required extensions?"

When I click "Yes", another error pops up stating "No suitable extensions found - Could not find any extension(s) that provides the missing node(s)"

I am looking for suggestions on what to try next.

Please do not post your questions twice.

Answers here. https://www.knime.com/forum/knime-users/missing-nodes-in-numeric-distances-workflow