Zapier not triggering API workflow

Hi

I’ve set up a Zap using a scheduled trigger, then added a bubble trigger api workflow action. The workflow I’m trying to trigger is ‘schedule an api workflow on a list’. No matter what I have tried I have not managed to get Zapier to trigger the workflow… despite it working fine when I trigger it from a button within bubble.

Does anyone know why this might not be working?

I am no expert and so it could be something obvious I am missing.

Thanks