Initialize include_context before usage

app.py

@@ -36,6 +36,8 @@ include_context = st.checkbox('Search in Help')
 
 if 'conversation' not in st.session_state:
     st.session_state.conversation = ""
+if 'include_context' not in st.session_state: 
+    st.session_state.include_context
 
 def handle_submit():
     user_input = st.session_state.user_input