I use the app both from the web and from the API.

Try to add this link https://www.dropbox.com/preview/Apps/SupaSend/photo_image%20(14).jpg in daily notes page, neither the preview is visible nor the link is visible. Here is quick demo https://dropover.cloud/de4589

The link is dropbox and it is a private sharing link. Everytime a link is added with some file extension, it tries to convert to an object, while this is a great UX but it fails for almost all the links to generate the preview. If there are limitations, atleast as a backup option it should show a default UX of the file or the link at most or atleast provide a way to convert that object to the link. But currently the link is not even visible.

Here is same link that was added in Craft app https://dropover.cloud/8c4eca