Can't Import Book Cover

I’ve tried multiple times to import the JPEG graphic for my book cover with zero success. I’ve researched it online and followed directions to a T, but all I end up with is a blank page for my cover.

My cover is 2031 x 3250 - is that too large to import? I’ve tried dragging it directly into the Research folder. I’ve tried File/Import. Nothing has worked. Please help!