When navigate any page show blank screen

see my simple code it run fine only main page biut did not show other page when click show blanck screen see attached pictrue , please see my code and findout the error and send me the right code how show the page

import streamlit as st
import time
from streamlit_option_menu import option_menu
import sys

sideb = st.sidebar
check1 = sideb.button(“Check or not?”)
textbyuser = sideb.text_input(“Enter some text”)
if check1:
sideb.info(“Code is analyzing your text.”)
page1 = st.Page( page = “pages/p1.py”, title = "Multi row and column selection for new DF " )
page2 = st.Page( page = “pages/p2.py”, title = "Multi Type Graph with DF " )
page3 = st.Page( page = “pages/p3.py”, title = "Record Select + ADD + Uudate+ Delete save history " )
pages = st.navigation([page1,page2,page3])
pages.run()

see picture

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