topic Re: Form renders using shell.js embed but 403 'You cannot fetch this type of form' error in logs in APIs & Integrations

Form renders using shell.js embed but 403 'You cannot fetch this type of form' error in logs

OManby — Fri, 13 Jun 2025 10:14:56 GMT

We have an Umbraco site using the Hubspot Umbraco integration which embeds forms using the shell.js script as here:

"<script charset="utf-8" type="text/javascript" src="//js-eu1.hsforms.net/forms/shell.js"></script>"

The form renders correctly on the page, but the following 403 reponse is visible in the network tab. Any clarification on why we'd be seeing this error despite the form rendering correctly, and if this is likely to create issues in the future given it currently works correctly?

Re: Form renders using shell.js embed but 403 'You cannot fetch this type of form' error in logs

GiantFocal — Sun, 15 Jun 2025 14:03:20 GMT

Hi @OManby,

The 403 error in your logs is likely from a background request the shell.js script is making, but if your form is rendering and working, it's not something to worry about. Just make sure your embed code uses ‎`https://` and matches what HubSpot provides. If submissions start failing or you notice issues, then it's worth investigating further, but for now, you can safely ignore it.

Additionally, check your ad blockers or browser privacy settings, as they may occasionally interfere with some requests.