Hi @zach_threadint ,
Thank you again 
Do I need the Enterprise subscription to use the serverless functions? Because I have tried the private apps before. But I always get the error
[ERROR] Couldn’t create a React extension with your file `/app/extensions/multi-step-flow-example-card.json` because you don’t have access to this beta. To learn more and sign up for the beta, visit HubSpot Login and Sign in
When I try to open the link, nothing is found.
So is it due to my incorrect operation, or can I not use this feature at all?
Best Regards,
Sunny