fixed the attribute error

app.py

@@ -72,7 +72,7 @@ if option:
                 st.session_state.final_documents = st.session_state.text_splitter.split_documents(st.session_state.docs)
                 st.session_state.vector = FAISS.from_documents(st.session_state.final_documents,st.session_state.embeddings)            
             st.success("Done!")
-        llm_model()
+            llm_model()
             
     elif option == "PDF(s)":
         pdf_files = st.file_uploader("Upload your PDF files", type=["pdf"], accept_multiple_files=True)
@@ -82,7 +82,6 @@ if option:
                 st.session_state.final_documents = st.session_state.text_splitter.split_text(st.session_state.docs)
                 st.session_state.vector = FAISS.from_texts(st.session_state.final_documents,st.session_state.embeddings)            
             st.success("Done!")
-            st.empty()
             llm_model()