Webflow needs to properly handle images with spaces in the names. When you export a static version of the site all spaces are replaced with %20 which means they are all broken links. Webflow doesn't provide a way to rename image files, so it should automatically rename any image with a space in the name.
It's going to take me 40+ hours just to fix the 50 images that had spaces in the names and were uploaded to webflow.
Thanks for the great product!