Getting error: "'RigidObject' object has no attribute 'has_external_wrench'"

I have created a USD file from an OBJ file using asset_converter and while trying to load it as a RigidObject (snippet below), I am running into error as mentioned in the title. Can someone please help me figure out what I am missing?

cfg = UsdFileCfg(
        usd_path=ouput_usd_name,
        visible=True,
        rigid_props=sim_utils.RigidBodyPropertiesCfg(rigid_body_enabled=True,),        
        mass_props=sim_utils.MassPropertiesCfg(mass=1.0),
        collision_props=sim_utils.CollisionPropertiesCfg(collision_enabled = True),
        scale=[0.001, 0.001, 0.001]
    )

    scene_cfg.skateboard = RigidObjectCfg(
        prim_path="{ENV_REGEX_NS}/Skate",
        spawn= cfg,
        init_state=RigidObjectCfg.InitialStateCfg(pos=(0.5+translation[0],0+translation[1],0.3666+translation[2]), rot = quaternion_wxyz),
    )

Thanks in advance.

I have run into the same issue!
Were you able to figure out the issue?

You might need to define Physics API in your USD (if not already present) to be considered as a rigid object.

Maybe this link might be helpful.