Cover image shown as white box when compiling Mobi. Works fine for ePub

Cover image shown as white box when compiling Mobi. Works fine for ePub. Tried to use Front matter and tried as dedicated cover image both fail to produce Cover image in Mobi. Please help.

Since cover settings are shared between these two different ebook formats, I wouldn’t worry about whether or not the setting is correct, if it works with ePub.

More likely you’re using an image format that isn’t fully supported by Kindle. Double-check their specifications and make sure the image file itself is good. No CMYK, no transparency, no vector formats, etc.

Also, be sure to test in Kindle Previewer for the best results. The end-consumer reading program isn’t optimised for development, and in particular is a bad place to be testing cover tweaks, since it caches cover thumbnails and uses them over new ones.