I change resources from example codes CustomShapesExample in this way:
// his model is huge! scale it down
ofVec3f scale(1, 1, 1);
// 3D logo
assimpModel.loadModel("Aston.3ds", true); //Link: https://free3d.com/3d-model/aston-martin-vantage-12213.html
assimpModel.setScale(scale.x, scale.y, scale.z);
assimpModel.setPosition(0, 0, 0);
Meshes for 3D physics should be lower in poly count. The model you linked to has 400k polygons so is probably causing the crash. You could start with a simple bullet box and use that to move around the high res mesh. Or you could load a low res version of the car as a collider mesh into bullet.