Image on Landing Page Shows As Grey Box or Blank Space

[#1]

Issue

Issue Description
When selecting an image to display on a landing page, the image shows as a featureless grey box or blank space. There are also spaces in the image's file name.
 

Solution

Issue Resolution
Ensure that there are no spaces in the image's file name in Marketo. If there are, remove the spaces from the file name and re-upload.