First, make sure the Emulator Output Protocol in Zen Studio is set to Auto, If that gives you any issues, you can also manually select the platform of the controller you are gaming with. Windows will then provide the appropriate functionality.
If you are testing on a PC, make sure the output is set to PC/Mobile.
Here's a super useful GPC script written by Community Staff Member DoGzTheFiGhTeR that runs the Cronus Zen and your controller through every possible test to show you within minutes that everything is working as it should (or perhaps it isn't?)
Download and run the latest version of the Cronus Zen Test Script 💾
Device Monitor Repeater (View Live Input Values)
Equipment In Use
Led Tester Viewer