Hello community,
We are facing an issue while using the new install flow from preview mode. Authorize steps works fine and we redirect back to hubspot from our install page after generating state token.
As per documentation Hubspot is supposed to trigger finalize flow which isnt happening. On checking the network logs it looks like it is unable to find the install url via ecosystem API(https://app.hubspot.com/api/ecosystem/v1/apps/details) which is resulting in Hubspot calling the base domain url which isnt allowlisted to be loaded in iFrame
Could you please help us understand why this is happening and how we can restore the expected flow?
Thank you in advance.

Hey @MKumar80,
Welcome to the Community!
Regarding the new install flow from preview mode, is it possible that you’re referring to the New Developer Platform and are following the steps seen here?
To ensure we’re on the same page here, would you mind providing a bit more context of the guide you’re following and which step you’re on when this occurs?
In the meantime, also tagging a few of our Top Contributors to ensure I’m not missing anything here:
Hey @SteveHTM, @Anton, @GiantFocal -- do you have any suggestions for @MKumar80 on this?
Thanks in advance!
Sam, Community Manager
Hi @SteveHTM, @Anton, @GiantFocal,
I am still using a legacy app to test this flow. I have created an app listing and tried from the preview mode there.
Here is the documentation I followed Understand app installation flow with the option for partner sign in - HubSpot docs