Hey @MDunlop where is this showing up blank? Is it within the preview or within the HubSpot editor?
Is the domain you’ve set this to be hosted on connected to HubSpot already? If you set the page to be hosted on a domain that’s not connected to HubSpot, it’s possible HubSpot is attempting to load the content on that domain but fails due to it not being connected and thus leading to a blank page.