# UI Extension iframe

**URL:** <https://community.hubspot.com/t/ui-extension-iframe/122736>\
**Category:** APIs & Integrations\
**Tags:** sdk\
**Created:** [December 18, 2024, 2:39pm UTC](https://community.hubspot.com/t/ui-extension-iframe/122736 "2024-12-18T14:39:47Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![SunnySun](https://avatars.discourse-cdn.com/v4/letter/s/7ba0ec/32.png) [@SunnySun](https://community.hubspot.com/u/SunnySun)\
**Post date:** [December 20, 2024, 10:01am UTC](https://community.hubspot.com/t/ui-extension-iframe/122736/5 "2024-12-20T10:01:16Z")

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Hi [@zach\_threadint](https://community.hubspot.com/t5/user/viewprofilepage/user-id/324811) ,

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](https://app.hubspot.com/l/whats-new/all?update=13899236)_  
When I try to open the link, nothing is found.

 ![SunnySun_0-1734688707711.png](https://d2qpr2jzcazej7.cloudfront.net/original/3X/f/0/f080e57057cbc5b1f43d76e413099015fe8a0c14.png)

So is it due to my incorrect operation, or can I not use this feature at all?

Best Regards,  
Sunny

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