How embed record edit mode on HTML Snippet??

Hello,

Context:

I am developing with a page component, where I want to pass to the iframe the ID of 'X' records and I want the iframe to open the edit mode of the given record so that I can edit and once the record is updated move on to the next one. This is done by a customer added to the customer portal.

So I'm a bit stuck on how to embed the edit mode in the HTML Snippet, in researching for information I found that the following code should work:

<iframe height='500px' width='100%' frameborder='0' allowTransparency='true' scrolling='auto' src='https://creator.zoho.com/<appowner>/<appname>/<formname>/record-edit/<reportname>/ID/<key>'></iframe>

I got it from this topic: https://help.zoho.com/portal/en/community/topic/can-i-embed-an-edit-mode-form-on-a-html-page

But at the moment of accessing it tells me the following (attached screenshot).

I added <key> thinking it was because the report wasn't published but it still didn't work.

I have given all possible access to the customer, both the report and the form, but it doesn't seem to work.

Thanks!