Fix: Better error handling in module initialization

app.py

@@ -961,6 +961,10 @@ try:
         demo = create_interface(bot, use_inference_api=IS_SPACES)
     except Exception as bot_error:
         logger.error(f"Error initializing RAGBot: {bot_error}", exc_info=True)
+        import traceback
+        error_trace = traceback.format_exc()
+        logger.error(f"Full traceback: {error_trace}")
+        
         # Create a demo that shows the error but still allows the interface to load
         with gr.Blocks() as demo:
             gr.Markdown(f"""
@@ -970,14 +974,19 @@ try:
             
             **Error:** {str(bot_error)}
             
-            This might be due to:
+            **Possible causes:**
             - Missing vector database (chroma_db directory)
             - Missing dependencies
             - Configuration issues
+            - Inference API initialization failed
+            
+            **For Spaces:**
+            - Make sure HF_TOKEN is set as a secret
+            - Check the logs tab for detailed error messages
             
             Please check the logs for more details.
             """)
-        raise  # Re-raise to be caught by outer try/except
+        # Don't re-raise - let the demo be created so users can see the error
     logger.info(f"Demo created successfully: {type(demo)}")
     # Explicitly verify it's a valid Gradio object
     if not isinstance(demo, (gr.Blocks, gr.Interface)):