You haven't provided info about:

• What Streamlit version you're using

• What python you're using

• Other info about your OS that could be relevant

BUT, here the answer is in Streamlit's documentation: st.experimental_rerun was deprecated in version 1.27.0. Use st.rerun instead.

You may need to downgrade if you want to use that attribute, or upgrade your code for the version you're using.