Figured it out: Header and Footer Library code are not supported via the Launch extension: https://docs.adobe.com/content/help/en/launch/using/extensions-ref/adobe-extension/target-extension/overview.html

I'm attempting to implement a function that sets all active activity names into a cookie value.After toggling on all Activity Response Tokens in setup, I'm following the basic instruction here to debug:  Response tokens.​  These instructions contain this simple script, and state that will work if ad...