Grid image not showing on mobile

Hi, this is my first design using Webflow - I have no coding experience so I may not have used the best approach to achieve my desired result.

I’m having a challenge with getting my image to load on mobile. The image shows in the mobile view on Editor but when I press Preview it appears as a line. The image is also not showing as I would like on the tablet version. In both instances the image is not displaying as set in the child grid parameters.

Here’s the mobile Editor and Preview view:

Screen Shot 2020-05-23 at 16.48.18

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

@JustRaye set height e.g. 45VH or 400px

Thanks @guoshuzhang - that fixed it!