Canva SVG Help - Black square over upload

I cannot seem to find information about this exact issue and I'm hoping this wise group can help. When I download some SVGs out of Canva (not all, but many), and upload them into Design Space, there is a black square in place of the image. It isn't laid over the image, it just is the image.

I cannot figure out what the cause is, and as such am unable to fix it. I've tried different types of images and different file types, but alas, I'm at a loss. Any help would be SO appreciated!