Update app.py

app.py

@@ -9,6 +9,11 @@ import torch
 
 model_repo_id = "Qwen/Qwen-Image" 
 hf_token = os.getenv("HF_TOKEN_SPACES")
+if HF_TOKEN is None:
+    raise RuntimeError(
+        "HF_TOKEN is not set in the environment. "
+        "Add it in the Space settings (Variables & secrets)."
+    )
 
 MODEL_CHOICES = [
     "black-forest-labs/FLUX.1-dev",