see Why a footprint points to a 3D model but the model file doesn't exist? for background explanation. I think this exact 3D-model is just not included in the kicad-package. Maybe there is some comparable 3d-model in the kicad-library? (search the files/folders for somethink with IDC and 2x08)
It seems in this case you are looking for a IDC-header with lever on the sides. I would recommend to search the manufacturer/distributor of your desired IDC-header. An example for instance is the Omron XG4A-1631. Or look at the universal component-search sites (snapeda, samacsys, …)