Legacy Mode: Useful for automate the process of extracting data from other sources like Google Analytic's. Legacy mode is a way to force Qlik Sense to reuse old load scripts that refer to absolute or relative file paths as well as library connections and it's just what we need in order to successfully run our example script.
But there will be some issues of enabling Legacy Mode in Qlik Sense Server, might have security implications in Sense Server that means you won't be able to manage the connection strings in QMC anymore.
