Update app.py

app.py

@@ -39,7 +39,9 @@ import gc
 import json
 import hashlib
 
+import requests
 import torch
+from safetensors import safe_open
 torch._dynamo.config.suppress_errors = True
 torch._dynamo.config.disable = True
 
@@ -297,6 +299,7 @@ else:
     print("  Fetching DEV checkpoint metadata (header only)...")
     dev_url = f"https://huggingface.co/{LTX_MODEL_REPO}/resolve/main/ltx-2.3-22b-dev.safetensors"
     hdr_resp = requests.get(dev_url, headers={"Range": "bytes=0-2000000"}, timeout=30)
+    hdr_resp.raise_for_status()
     hdr_size = int.from_bytes(hdr_resp.content[:8], "little")
     hdr_json = json.loads(hdr_resp.content[8:8 + min(hdr_size, len(hdr_resp.content) - 8)])
     dev_metadata = hdr_json.get("__metadata__", {})