Update app.py

app.py

@@ -14,7 +14,10 @@ prompt_template = """Answer the question only according to the information provi
 ## Question : 
 # {}"""
 
-st.session_state.stage = "crawl-input"
+try:
+    st.session_state.stage
+except Exception:
+    st.session_state.stage = "crawl-input"
 
 if st.session_state.stage == "crawl-input":
     config = st.text_area("Enter the start URL and the limit of crawling (in this format : URL,limit):")