Remove error message after finishing processing

app.py

@@ -99,7 +99,8 @@ def main():
 
 
     if few_documents:
-        st.warning(st.session_state['msg'])
+        error_msg = st.empty()
+        error_msg.warning(st.session_state['msg'])
         msg = 'Prosseguir' if portuguese else 'Proceed'
         if st.button(msg):
             query = translate(query_pt, 'pt', 'en') if portuguese else query
@@ -114,7 +115,8 @@ def main():
                 result.markdown(f'Your summary for "{query}":\n\n> {summary}')
                 with result.expander(f'Paragraphs used in summarization'):
                     st.markdown(text.replace('\n', '\n\n'))
-
+            
+            error_msg.empty()
             st.session_state['few_documents'] = False
             few_documents = False