Embedded forum not working correctly

[mycreativepixel (Sally)]

I’m using HTML code from sendgrid.com to collect email addresses, and for some reason, the whole forum won’t show. Does anyone know what’s going on? It’s probably something simple that I’m missing.

https://preview.webflow.com/preview/3-paws-marketing?utm_medium=preview_link&utm_source=designer&utm_content=3-paws-marketing&preview=69660c7f2cdf1606af0b307578f95a58&pageId=61cd23062ef0ae7074fb6097&workflow=preview

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Here is my site Read-Only: LINK
(how to share your site Read-Only link)