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app.py

@@ -785,7 +785,14 @@ def nutrition_disorder_streamlit():
                 st.write(message["content"])
 
         # Chat input with custom placeholder text
-        user_query = st.chat_input("You: ").strip()  # Blank #1: Fill in the chat input prompt (e.g., "Type your question here (or 'exit' to end)...")
+        user_query = st.chat_input("Type your question here (or 'exit' to end: ").strip()  # Blank #1: Fill in the chat input prompt (e.g., "Type your question here (or 'exit' to end)...")
+
+        # Check if user_query is None before calling .strip()
+        if user_query:
+          user_query = user_query.strip()
+        else:
+          user_query = ""  # Default to an empty string if no input is provided
+          
         if user_query:
             if user_query.lower() == "exit":
                 st.session_state.chat_history.append({"role": "user", "content": "exit"})