st.write(st.__version__)
...then call streamlit run on your script and make sure it says the same
version as above. If not the same version, check out these
instructions for some sure-fire ways to set up your
environment.
Check #4: Is your browser caching your app too aggressively?
There are two easy ways to check this:
Load your app in a browser then press Ctrl-Shift-R or ⌘-Shift-R to do a
   hard refresh (Chrome/Firefox).
As a test, run Streamlit on another port. This way the browser starts the
   page with a brand new cache. For that, pass the --server.port
   argument to Streamlit on the command line:
bash
   streamlit run my_app.py --server.port=9876
Check #5: Is this a Streamlit regression?
If you've upgraded to the latest version of Streamlit and things aren't
working, you can downgrade at any time using this command:
