How to open streamlit webpage

Hello guys i downloaded the new streamlit upgrade and since then when i go to terminal to see the page i have created, when i type the code streamlit run it gives me error

First, can you confirm that the new version is installed correctly?

In your terminal, try streamlit version to see what version it thinks you are running. Then try streamlit hello. If either of those don’t work, I would try to reinstall Streamlit.

If the above two tests are fine, then it would be helpful to know more about your app to diagnose why you are having problems.