This could be caused for many reasons. For instance, if you’re using an online website designer such as WIX website designer, they might be blocking the external code that is “unknown” to their system.
To resolve this issue, try simply saving the image you want to use to your computer. Next, using their website designing tools, “insert” or “add” the saved image where ever you want it located on your website. Then add a hyperlink to that image using your affiliate link or affiliate link slug.