Update app.py

app.py

@@ -40,6 +40,7 @@ from functools import partial
 from huggingface_hub import hf_hub_download
 
 from instantmesh.utils import get_render_cameras, find_cuda, check_input_image, generate_mvs, make3d
+from instantmesh.src.utils.train_util import instantiate_from_config
 
 # This was the code needed for TripoSR
 """