Bootstrap Blocks (and other components) CSS, images broken?

I’m not sure what I’m doing wrong. Some images and css (and java) of Blocks are broken upon importing. The first project I worked on did not have this issue. But I’ve restarted and now it’s a problem. Any idea what I’m doing wrong? I’m making sure to add the resources under Libraries & Manager. If I’m starting a new project, is there something else that I’m supposed to do?

Are you using Bootstrap 3.x or 4.x? The Blocks that come with Pinegrow are only for Bootstrap 3.x sites.