WordPress Importer Plugin Errors

I’m getting the following errors when trying to import an xml file generated by a Squarespace export:

Failed to import Media “attachment-54075744e4b05b80996074ab”
Failed to import Media “attachment-53f20c7be4b0bc14a81fa86d”
Failed to import Media “attachment-50fc02e3e4b01869bf414498”
Failed to import Media “attachment-50fc02e3e4b01869bf414496”
Failed to import Media “attachment-50fc02e3e4b01869bf414499”
Failed to import Media “attachment-50fc02e3e4b01869bf414497”

All of the posts are imported fine, and the images show up but are linked to the original url.

I’ve done some searching but I couldn’t find a fix.