How to train blender dataset with nerfstudio?

[G20202502]

I'm now trying to use zipnerf in nerfstudio to train the lego scene of blender dataset. But after training, the model can only render purely white images, and I can't figure out the reason. This is the command I use:

ns-train zipnerf --data /data/nerf_synthetic/nerf_synthetic/lego blender-data

And I've also changed the gin_file path in zipnerf_config.py from "configs/360.gin" to "configs/blender.gin". Could you please tell me how to make it work?