using SSJS dynamically build a query based on referencing a DE for the lookup DE name and Journey Name.

I'm looking for help tweaking my first SSJS automation script. I've attached the script and error log. The goal is to:

·       Retrieve the value in a Data Extension 'Staging_DE_Name' using DataExtension.Init("AFF10259-DAEA-4B5F-8524-A2AF7FB487D5");

·       Assign it to a variable dynamicDEName

·       Build the query string with as "INNER JOIN [" + dynamicDEName + "] AS de ON \n";

·       Have the query run and populate a target Data Extension ‘JourneySendsAR’