Update app.py

app.py

@@ -39,7 +39,7 @@ embedding_model = SentenceTransformer('all-MiniLM-L6-v2')
 # Hugging Face API token
 api_token = os.getenv('HUGGINGFACEHUB_API_TOKEN')
 if not api_token:
-    raise ValueError("HUGGINGFACEHUB_API_TOKEN environment variable is not set")
+    raise ValueError("HUGGINGFACEHUB_API_TOKEN environment variable is not set or invalid")
 
 # Initialize the HuggingFace LLM
 llm = HuggingFaceEndpoint(
@@ -195,6 +195,7 @@ demo.launch()
 
 
 
+